A 240 meter long train crosses a 300 meter long platform in 27 seconds. What is the speed of the train in Kmph?

If a : b = 20:5 then find out the value of (13a-9b): (11a-7b)?

Four years ago, the ratio of the age of A and B was 2 : 3 and after four years it will become 5 : 7. Find the present age. 

An amount of money at compound interest grows up to Rs. 3,840 in 4 years and up to Rs. 3,936 in 5 years. Find the rate of interest. 

The circle-graph given here shows the spending of a country on various sports during a particular year. Study the graph carefully and answer the question given below it.

If the total amount spent on sports during the year was Rs. 2 crores, the amount spent on cricket and Hockey together was:

The length of the chord of a circle is 8 cm and perpendicular distance between center and the chord is 3 cm. Then the radius of the circle is equal to:

Simple interest on a certain sum is equal to the sum itself. find the time if rate of interest and time are numerically equal.

How many kilogram of rice costing Rs.60 per kg must be mixed with 24 kg of rice costing Rs.42 per kg so that there may be a gain of 12% by selling the mixture at Rs.56 per kg?