Find the area of a white sheet required to prepare a cone with a height of 21cm and the radius of 20cm.

A, B and C contract a work for Rs. 550. Together A and B are to do 7/11 of the work. The share of C should be?

The No. of mangoes on three baskets are in the ratio of 3 : 5 : 7. In which ratio the no. of mangoes in first two baskets must be increase so that the new ratio becomes 5 : 6 : 8.

Income of A and B are in ratio 3:4 and their expenditure are in ratio 4:7 their saving are equal if A save Rs 1760 more and B increase his expenditure by Rs 880 then their saving are in ratio 7:4 .find the average income of A and B?

If the radius of a circle is decreased by 50%, its area is reduced by

If the ratio of two numbers is 13 : 15 and their L.C.M. is 39780. Then the numbers are?

Which neighbouring country of India objects the Kishanganga dam project?

Who is the author of the book named “Waiting for the Mahatma”?