If and then:
Let AD and BC be two verticle pole of A&B on horizontal ground. If AD=8 and BC=11 and AB=10 then the distance of the point M on AB from the pt A st is min is ....
The angle of elevation of the summit of a mountain from a point on the ground is . After climbing up one km towards the summit at an inclination of from the ground, the angle of elevation of the summit is found to be . Then the height (in km) of the summit from the ground is :