RRB Government Jobs Exams

A boat sails 6 km upstream at the rate of 4 kmph. If the stream flows at the rateof 3 km/hr., how long will it take for the boat to make the return journey?

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RRB Other Question

A wheel rotates 12 times in a minute and moves 5 metres during each rotation.What is the time taken for the wheel to move through 930 metres? A car covers a distance PQ in 32 minutes. If the distance between P and Q is 54km. Find the average speed of the car.