SSC CHSL Model Paper 4

Question : 64 of 100

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 28.75 m under similar conditions, will be:

10 m
12.5 m
17.5 m
21.25 m

Validate

Solution:

Let the height of the building be x metres.
Less lengthy shadow, less is the height (direct proportion)

40.25 : 28.75 : : 17.5 : x

40.25 × x = 28.75 × 17.5

⇒

x = 28.75 × 17.5/40.25

⇒

x = 12.5

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