18. How fast is the area A of a rectangle changing when the length L is increasing at 2 cm/s and the width w is decreasing at 3 cm/s at the instant that its length is 100 cm and its width is 50 cm? A) 50 cm²/s -200 cm²/s B) -300 cm²/s 400 cm²/s C) D)

18. How fast is the area A of a rectangle changing when the length L is increasing at 2 cm/s and the width w is decreasing at 3 cm/s at the instant that its length is 100 cm and its width is 50 cm? A) 50 cm²/s -200 cm²/s B) -300 cm²/s 400 cm²/s C) D)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

18. How fast is the area A of a rectangle changing when the length L is increasing at 2 cm/s and the width w is
decreasing at 3 cm/s at the instant that its length is 100 cm and its width is 50 cm?
A) 50 cm/s
B) -300 cm²/s
C) -200 cm/s
D) 400 cm/s

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