SSC Government Jobs Exams Numerical Ability Boats and Streams

A boat covers 12 km upstream in 3 hours, while it covers 36 km upstream and 24 km downstream in hours. What is the speed of the current?

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P and Q are 27 km away. Two trains with speeds of 24 km/hr and 18 km/hr respectively start simultaneously from P and Q and travel in the same direction. They meet at a point R beyond Q. Distance QR is Average rainfall on Monday, Tuesday, Wednesday and Thursday is 420.5 cm and average on Tuesday, Wednesday, Thursday and Friday is 330.5 cm. If the ratio of rainfall for Monday and Friday is 20 : 21, find the rainfall in cm on Monday and Friday.