Question
In how many years will the simple interest on a sum of
money be equal to the principal at the rate of   %  per 7 annum?Solution
- Rita walks from her home to office. If she walks at 8 km/h, she arrives 20 minutes late. But if she walks at a speed of (5/2) m/s, she gets there just 5 mi...
If the speed ratio of A, B and C while covering the same distance is 7 : 3 : 1 then find the ratio of time taken by them.
A and B move towards each other at the same time at the speeds of 15 km/h and 25 km/h, respectively and the distance between them is 60 km. How much is ...
A bike covers 60 km with a speed of 20 km/hr. Find the speed of the bike for the next 50 km journey so that the average speed of the whole journey will ...
- A basketball has a radius of 30 cm. Calculate its total surface area.
Vicky and Vikram start running simultaneously around a rectangular track of length 700m from the same point at speeds of 40 km/hr and 20 km/hr. When wil...
A car travels at three-fourths of its original speed, taking 20 minutes more than the usual time to cover a given distance. Find ...
A car running with a speed of 60 km/hr takes 16 hours to go from 'A' to 'B'. If on the way back from 'B' to 'A', the car takes 20% less time than it tak...
- Find the distance covered (in km) by Rina in 5 hours if her speed is 20 m/s.
Vikas covered a certain distance by bike. If he covers 40% of the distance at 40 km/h, 50% of the distance at 25 km/h and the remaining 10% distance at ...
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