Compound interest (compounded annually) on a certain sum of money for 2 yr at 4% per annum is Rs. 102. The simple interest on the same sum for the same rate and for the same period will be

The base of conical tent is 19.2 m in diameter and the height of its vertex is 2.8 m. the area (in sq m) of canvas required to put such a tent (take π = 22/7) is nearly

Amount income of A and B are in the ratio 4 : 3 and their annual expenses in the ratio 3 : 2. If each saves Rs 60000 at the end of the year, the annual income of A is

A trader sells two articles at Rs 6000 each. He makes a profit of 20% in the sale of the first article and a loss of 20% in the sale of the second articles, what is his net gain or loss per cent?

If Ram got 35% marks and failed by 15 marks and Mohan got 40% and scored 35 more than the pass marks, what is the percentage necessary for passing ?

In an election involving two candidates, 68 votes were declared invailed. The winning candidates score 52% and win by 98 votes. The total number of votes polled is

A train runs for 20 min at the speed of 75 km/h, in the next 25 min at the speed of 60 km/h and the last 15 min at the rate of 40 km/h, find out the average speed of the train .

A money-lender finds that due to a fall in the annual rate of interest 8% to 7¾% his yearly income diminishes by Rs. 61.50 his capital is

A merchant has 1000 kg of sugar, part of which he sells at 8% profit and the rest at 18% profit. He gains 14% on the whole. The quantity (in kg) sold at 18% profit is

A man can do a piece of work in 5 day, but with the help of his son, he can do it in 3 days. In what time can the son do it alone ?