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Total age of 6 sisters = 30 × 6 = 180 years 5 years ago, Total sum of ages = 180 – (5 × 6) = 150 years But at that time (5years ago), there were 5 sisters in the group ∴ Average age at that time (5 years ago) = 150/5 = 30 years Hence, the required answer is 30 years.
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The income of ‘A’ increases by 20% every year. If his income 3 years hence from now will be Rs. 13478.4, then find his income a year before from now...
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A boat covers a distance of 108 km downstream in 3 hours. If the ratio of upstream speed to downstream speed of the boat is 5:9, then find the distance ...
The speed of a boat in still water is 35 km/hr. If the boat covers 150 km in upstream in 5 hours, then find the time taken by the boat to travel 200 km ...
A boat can cover 120 km in upstream in 6 hours and 180 km in downstream in 3 hours. Find the speed of the stream.
Boat ‘A’ can cover 120 km in still water in 12 hours. In still water, if the ratio of the speed of boat ‘A’ to that of ‘B’ is 5:4 and the sp...
