Question

A vertical stick 10 cm long casts a shadow 8 cm long. At the same time a shadow 30 m long. Determine the height of the tower.

Answer 1

Length of stick = 10 cm
Length of shadow of stick = 8 cm
Length of shadow of tower = h cm
In ΔABC and ΔPQR
∠B = ∠Q = 90°
And, ∠C = ∠R [Angular elevation of sun]
Then, ΔABC ~ ΔPQR [By AA similarity]