Question 9

X is 5 ft tall and he notices that he casts a shadow that's 3 ft long. He then measures that the shadow cast by his school building is 30 ft long. How tall is the building?

Solution

Let say, the length of the building be x ft.

(Length of building/Shadow of the building) = (Height of boy/Shadow of the boy)

So,

$$\ \frac{x\ }{30}=\frac{5\ }{3}.$$

$$\ x\ =\frac{5\times30\ }{3}.$$

$$\ x\ =50.$$

A is correct choice.

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