A man walking at the rate of 5 km/hr crosses a bridge in 15 minutes. The length of the bridge (in meters) is-

A train takes 18 sec to pass completely through a station 162m long and 15 seconds through another station 120...

If a boat goes 7km upstream in 42 minutes and the speed of the stream is 3kmph,then the speed of the boat in s...

Tea worth tk. 126 per kg and Tk.135 per kg are mixed with a third variety in the ratio 1:1:2. If the mixture i...

In how many years, Tk. 150 will produce the same interest @8% Tk.800 produce in years @4.5% ?

The compound interest on Tk 30,000 at 7% per annum is TK.4357. The period (in years) is:

A rectangular plot measuring 90 meters by 50 meters is to be enclosed by wire fencing.If the poles of the fenc...