Two trains, whose respective lengths are 120 metres and 180 metres, cross each other in 15 seconds when they are moving in opposite directions and in 50 seconds when they are moving in the same direction. What is the speed of the faster train (in km/hr)?

What number has to be added to each term of 2:5 to make the ratio 7:8?

A sum of Rs. 642 is divided among X, Y and Z such that X gets Rs. 144 more than Y. Y gets Rs. 90 more than Z. Find the share of Z?

The ratio between two numbers is 7:8. If each number is increased by 9, the ratio between then become 10:11, find the difference between numbers.

What number has to be added to each term of 2:3 to make the ratio 4:5?

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