Previous Year Paper
CAT-2003-Previous Years Paper
A car is being driven, in a straight line and at a uniform speed, towards the base of a vertical tower. The top of the tower is observed from the car and, in the process, it takes 10 min for the angle of elevation to change from 45° to 60°. After how much more time will this car reach the base of the tower?
Let AB = 1
Therefore, BC = 1
∴ tan 60 =
∴ CD = BC – BD
As time for travelling CD, i.e.,is 10 min.
∴ Time required for travelling BD = × 10