Fig. 17.12 Find the height of the tower in Fig. 17.12.
Use a scale of 1 cm to represent 3 m.
Fig. 17.13 shows a boy sitting on a
platform 7.5 m high. He observes that
the angle of elevation of the top of the
opposite building is 40°. The platform is 37.5m from the building. find the height of the building.​