TOP 60 QUES 60 MIN

60. 17 : 60 : : 20 : ?

From the top of a building 60m high the angles of depression of the top and the bottom of a tower are observed to be 30o and 60o. Find the height of the tower.

From the top of a building AB,60 m high,the angles of depression of the top and bottom of a vertical lamp post CD are observed to be 30 and 60 respectively.Find the height of the lamp post.

From the top of a building AB,60 m high,the angles of depression of the top and bottom of a vertical lamp post CD are obsevved to be 30o and 60o respectively.Find the horizontal distance between AB and CD

From the top of a building AB,60 m high,the angles of depression of the top and bottom of a vertical lamp post CD are observed to be 30o and 60o respectively.Find the difference between the heights of the building and the lamp post.

A body cools in 7 min from 60^@C to 40^@C What will be its temperature after the next 7 min? The temperature of surroundings is 10^@C .

Hot water cools from 60^@C to 50^@C in the first 10 min and to 42^@C in the next 10 min. The temperature of the surrounding is