16. A sphere is cut to shape a circular cone. How much of the material can be saved?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Answer number 16

4Gılll Gilll
17:02
95%
+ M5_Application of...
Find the differentials of the following:
1. z = V- 3x
2. r =
Find the first and second derivative of y with respect to x from the parametric equations given.
3. x =T y = t? + 3
4. x = VT-i; y = t - 3t
5. x = VE+ 2; y = t² - 3
Evaluate the limit of the following
6. lim sin
cas Sx
7.lim lan
sin x
8. lim(
0 sin
9. The base of a right triangle is fixed at 3ft.the hypotenuse is 5ft. long and subject to change. Find
the approximate change in altitude when hypotenuse is changed by small amount Ah.
10. The diameter of circle is measured and found to be 6ft with a maximum error of 0.1 in. Find the
approximate maximum error in the computed area.
11. Find the change in the lateral surface area of a right circular cone, with radius of base fixed as r,
when the altitude h changes by a small amount Ah.
12. The position of an object at time t is given by x = V3t – 4 ++4, where x is in feet and t is in
seconds. What are the object's velocity, acceleration and total distance travel at time t = 1?
13. A ball is thrown upward from the ground with a speed of 40ft/sec; at the same instant another
ball is dropped (from rest) from a height of 100ft. Show that they strike the ground at the same time.
14. Given the parametric equation below determine the total velocity and acceleration at t = 2
x(t) = v -+t and y(t) = t? – 2VE + 3
15. Find two numbers whose sum is a, it the product of one by the cube of the other is to be maximum.
MODULE 5 APPLICATION OF DERIVATIVES
25
ENGINEERING CALCULUS 1
16. A sphere is cut to shape a circular cone. How much of the material can be saved?
17. Find the most economical proportions for a cylindrical cup.
18. A rectangular field of fixed area is to be enclosed and divided into three lots by parallel to one sides.
What should be the relative dimensions of the field to make the amount of fencing?
19. A wall 10 ft high is 8ft from the house. Find the length of the shortest ladder that will reach the
house, when one end rest on the ground outside the wall.
20. A triangular trough is 10ft long, 6 ft across the top, and 3 ft deep. If water flows in at the rate of
3ft. /min, find how fast the surface is rising when the water is 6 in. deep.
21. A ladder 20 ft long leans against the wall. If the top slides downward at the rate of 2ft/sec, how
fast the lower ends is moving when it is 16ft from the wall.
22. A man 6ft tall walks away from a lamp post 16ft high at the rate of 5 mi/hr. How fast does the
shadow lengthen?
23. A train, starting at noon, travels north at 40 mi/hr. Another train, starting from the same point at
2 PM, travels east at 50mi /hr, how fast the two trains are separating at 3PM.
24 A Fght ot ouo louol ctande 20ft irom the boure anc
ft from the path londing
the hou
Transcribed Image Text:4Gılll Gilll 17:02 95% + M5_Application of... Find the differentials of the following: 1. z = V- 3x 2. r = Find the first and second derivative of y with respect to x from the parametric equations given. 3. x =T y = t? + 3 4. x = VT-i; y = t - 3t 5. x = VE+ 2; y = t² - 3 Evaluate the limit of the following 6. lim sin cas Sx 7.lim lan sin x 8. lim( 0 sin 9. The base of a right triangle is fixed at 3ft.the hypotenuse is 5ft. long and subject to change. Find the approximate change in altitude when hypotenuse is changed by small amount Ah. 10. The diameter of circle is measured and found to be 6ft with a maximum error of 0.1 in. Find the approximate maximum error in the computed area. 11. Find the change in the lateral surface area of a right circular cone, with radius of base fixed as r, when the altitude h changes by a small amount Ah. 12. The position of an object at time t is given by x = V3t – 4 ++4, where x is in feet and t is in seconds. What are the object's velocity, acceleration and total distance travel at time t = 1? 13. A ball is thrown upward from the ground with a speed of 40ft/sec; at the same instant another ball is dropped (from rest) from a height of 100ft. Show that they strike the ground at the same time. 14. Given the parametric equation below determine the total velocity and acceleration at t = 2 x(t) = v -+t and y(t) = t? – 2VE + 3 15. Find two numbers whose sum is a, it the product of one by the cube of the other is to be maximum. MODULE 5 APPLICATION OF DERIVATIVES 25 ENGINEERING CALCULUS 1 16. A sphere is cut to shape a circular cone. How much of the material can be saved? 17. Find the most economical proportions for a cylindrical cup. 18. A rectangular field of fixed area is to be enclosed and divided into three lots by parallel to one sides. What should be the relative dimensions of the field to make the amount of fencing? 19. A wall 10 ft high is 8ft from the house. Find the length of the shortest ladder that will reach the house, when one end rest on the ground outside the wall. 20. A triangular trough is 10ft long, 6 ft across the top, and 3 ft deep. If water flows in at the rate of 3ft. /min, find how fast the surface is rising when the water is 6 in. deep. 21. A ladder 20 ft long leans against the wall. If the top slides downward at the rate of 2ft/sec, how fast the lower ends is moving when it is 16ft from the wall. 22. A man 6ft tall walks away from a lamp post 16ft high at the rate of 5 mi/hr. How fast does the shadow lengthen? 23. A train, starting at noon, travels north at 40 mi/hr. Another train, starting from the same point at 2 PM, travels east at 50mi /hr, how fast the two trains are separating at 3PM. 24 A Fght ot ouo louol ctande 20ft irom the boure anc ft from the path londing the hou
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