Question
A sum of money invested at a certain rate of compound
interest per annum amounts to ₹86,800 in 2 years and to ₹95,4800 in 3 years. Find the rate of compound interest per annum.Solution
Rate of interest per annum = {Amount of (n + 1) year/Amount of (n) year} × 100 - 100 = (95480/8680) × 100 - 100 = (11/10) × 100 - 100 = 10 The rate of interest per annum is 10%.
A boat covers a distance of 36 kilometers in still water in 24 minutes. If the current's speed is two-fifths of the boat's speed in still water, how lon...
Speed of a boat in still water to speed of boat in upstream is 11: 9. If the boat can travel 260 km in downstream in 10 hours, then find the time taken ...
A boat takes a third time to cover a certain distance downstream compared to upstream. What is the ratio of the speed of the boat in still water to the ...
Two boats X and Y start towards each other from two places, 119 km apart. Speed of the boat X and Y in still water are 7 km/hr and 10 km/hr respectively...
A boat is navigating a river with a current speed of 2 km/h. It takes the boat 75 minutes longer to cover a distance of 56 km upstream than it does to c...
A boat takes 1/4th time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of current is?
Boat ‘A’ covers 150 km in downstream in 15 hours. If the speed of stream is 2 km/hr then find the time taken by boat ‘A’ to cover 108 km in upst...
A boat can cover 80 km upstream and 200 km downstream in 14 hours. Speed of the stream is how much less than the speed of the boat in still water if the...
A boy can swim a certain distance downstream in 3 hours and return in 7 hours. If the rate of stream is 4 kmph then what is the speed of boy in still wa...
A boat covers a distance of 96 km downstream in 4 hours and returns upstream in 6 hours. Find the speed of the stream.