Question
The speed of a boat in still water is 8 km/hr and speed
of current is 3 km/hr. If time taken to cover a certain distance upstream is 11 hours, then how long will the boat take to cover the same distance downstream?Solution
Total distance = 11 × (8 – 3) = 55 km Required time = 55/(8 + 3) = 55/11 = 5 hrs
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What should be the minimum number of chocolates so that when distributed among 3,4,5,6 and 7 children, 1,2,3,4 and 5 chocolates are left respectively?
The HCF of two numbers is 48, and their LCM is 1440. If one of the numbers is 576, find the other number.
A, B and C start running at the same time and at the same point in the same direction in a circular stadium. A completes a round in 720 seconds, B in 10...
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Let N be the greatest number that will divide 72, 105, 138 leaving the same remainder in each case. Then sum of the digits in N is:
Find difference between the LCM and HCF of 14, 42 and 77.
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