Two trains A and B start from Delhi and Kolkata towards Kolkata and Delhi respectively. After passing each other, they take 10 hours and 2 hours 30 minutes respectively to reach their destinations. If Train A is moving at the speed of 37.5 kmh", what is the speed of Train B ?

A train travelling at 32 kmh"1 leaves from Delhi at 7am, and another train travelling at the speed of 40 kmh- 1 starts at 3pm in the same direction. How many km from Delhi will they meet ?

At a certain rate of simple Interest Rs 600 amounted to Rs 750 in 3 years. If the rate of interest be increased by 4%, what will be the amount after 3 years ?

The simple interest on a certain sum of money for two years at 5% per annum is Rs 1200. What is the compound interest at the same rate and for the same time ?

In a stream running at 3 km/h, a motorboat goes 8 km upstream and back again to the starting point in 120 minutes. What is the speed of the motorboat in still water ?

A man buys two items 'A' and ' B ' for Rs 990. He sells item 'A'atalossof6.5%anditem'B'atagainoflO%.Onthewhole he neither gains nor loses. What is the cost of item 'B' ?

If Ram is thrice as fast as Shyam, and is therefore able to finish a work in 64 days less than Shyam, what is the time in which they can do it working together ?