Question
A man can swim at the rate of 7 km/hr in still water. If
the speed of the water is 4 km/hr, then the time taken by him to swim 15 km upstream isSolution
Rate upstream = 7 – 4 = 3 km/hr Distance upstream = 15 km Hence, required time = distance/speed = 15/3 = 5 hours
The least number which when divided by 6, 7, 10, 13, and 15 leaves the same remainder 5 in each case, is:
What is the Highest Common Factor of 54, 162 and 270?
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