A and B together can complete a work in 21 days. If A takes 42 days to complete the work alone, how many days will B take to complete the same work alone?

P, Q, R are employed to do a work for Rs. 5750. P and Q together finished 19/23 of work and Q and R together finished 8/23 of work. Wage of Q, in rupees, is-

A person invests money in three different schemes for 6 years, 10 years and 12 years at 10%, 12% and 15% simple interest respectively. At the completion of each scheme, he gets the same interest. The ratio of his investments is-

Cost price of 25 chairs equals the selling price of 20 chairs. Find the profit %.

The interest compounded annually on a sum of Rs. 56000 at a rate of 7% p.a. after 3 years is what percentage of the simple interest on a sum of Rs. 72000 at a rate of 9% p.a. after 5 years?

One acute angle of a right-angled triangle is double the other. If the length of its hypotenuse is 10 cm, then its area is

Directions: The bar graph given below shows the production (in ' 000 tones) of rice of a country for the year 2007 to 2011. Study the graph carefully and answer the question given below it.

What is the percentage increase in the production of rice in the year 2008 in comparison to the year 2007? 

A triangle and a parallelogram are on the same base and between the same parallels. The ratio of the area of triangle and parallelogram is______.