A trough filled with water is 2 m long and has a cross section in the shape of an isosceles trapezoid 30 cm wide at the bottom, 60 cm wide at the top, and a height of 50 cm. If the through leaks water at the rate of 2000 cm/min, how fast is the water level falling when the water is 20 cm deep ? A. -5/21 cm/s B. -3/45 cm/s C. -4/23 cm/s D. -3/54 cm/s

A trough filled with water is 2 m long and has a cross section in the shape of an isosceles trapezoid 30 cm wide at the bottom, 60 cm wide at the top, and a height of 50 cm. If the through leaks water at the rate of 2000 cm/min, how fast is the water level falling when the water is 20 cm deep ? A. -5/21 cm/s B. -3/45 cm/s C. -4/23 cm/s D. -3/54 cm/s

Elementary Geometry for College Students

6th Edition

ISBN:9781285195698

Author:Daniel C. Alexander, Geralyn M. Koeberlein

Publisher:Daniel C. Alexander, Geralyn M. Koeberlein

Chapter8: Areas Of Polygons And Circles

Section8.4: Cicumference And Area Of A Cicle

Problem 45E: The diameter of a carousel merry-go-round is 30ft. At full speed, it makes a complete revolution in...

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