Chain Rule Practice Test 1 with solutions

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Question : 6 of 40

Marks: +1, -0

A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the building, which casts a shadow of length 28.75m under similar condition will be:

21.25 m
17.5 m
12.5 m
10 m

Solution:

Shadow (m)	Object (m)
40.25	17.5
28.75	x

⇒

x/{17.5}

=

{28.75}/{40.25}

∴ x =

{28.75×17.5}/{40.25}

= 12.5 m

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