200 meter long train crosses a bridge with the speed of 54 km/hrs. in 30 sec. Find the length of bridge?

The number of pairs of positive integers whose sum is 99 and HCF is 9 is: 

If a man estimates his loss as 20% of the selling price, then his loss percent is:

Seema is 8 years elder than his sister and 7 years younger than her brother Raj. When Raj was born, her father’s age was 30 and when Seema’s sister was born his mother’s age was 34. Find the difference between ages of Seema’s father and his mother?

The ratio of two numbers is 3:8 and their difference is 115. The smaller of the two numbers is:

In the afternoon, a student read 100 pages at the rate of 60 pages per hour. In the evening, when she was tired, she read 100 more pages at the rate of 40 pages per hour. What was her average rate of reading the pages per hour? 

The angles of elevation of top and bottom of flag kept on a flag post from 30 metres distance, are 45 ° and 30 ° respectively. Height of the flag is [ taking 13 = 1.732)