The angle of elevation of the top of a tower from a point A on the ground is `30^0dot` On moving a distance of 20 metres towards the foot of the tower to a point B the angle of elevation increases to `60^0dot` Find the height of the ttower and the distance of the tower from the point A.

Explanation

Let ADC be traingle right angled at C

DC be the height and AC bee the base

B is the mid point of AC

Length of AB=20m

Length of BC=d-20 m

Length of AC(AB+BC)=d m

Also,`/_B=60^0`

`/_A=30^0`

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