A tower is 50 m high when the suns altitude is 45 then what will be the length of its shadow

34.

A boat is moving away from an observation tower. It makes an angle of depression of 60° with an observer's eye when at a distance of 50 m from the tower. After 8 sec, the angle of depression becomes 30°. By assuming that it is running in still water, the approximate speed of the boat is

• 33 km/hr

• 42 km/hr

• 45 km/hr

• 50 km/hr

C.

45 km/hr

In ΔABC,

Distance  = 100m,  time = 8sec

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A tower casts a shadow that is 60 feet long when the angle of elevation of the sun is 65 degrees. How tall is the tower