If 738 A6A is divisible by 11, then the value of A is-

From a right cone of height h and with base radius r a cone has been cut of from the centre of the height. The volume of remaining frustum of the cone is.

In a kilometer race, A can give B a start of 100 m or 15 seconds. How long does A take to complete the race?

What is the quotient , when 2645 is divided by 48 ? 

Two years ago, the ratio of the age (in years) at A and B was 2:3. The ratio of their respective ages, three years from now, will be 3:5. What will be the ratio of respective ages of A and B, 6 years from now?

How many pairs of twin primes are there between the integers 1 to 100? 

Two students appeared for an examination. One of them secured 9 marks more than the other and his marks were 56 % of the sum of their marks. The marks obtained by them are 

The area  of a circle is 616 sq cm, find its circumference?