Question
If a sum of money becomes 4000 in 2 yrs and 5500 in 4
yrs 6 months at the same rate of simple interest per annum. Then the rate of simple interest isSolution
Amount in 2 years = 4000 amount in 4.5 years = 5500 interest received in 2.5 years= 5500-4000 = 1500 interest received in 1 year = 600 interest received in 2 years = 1200 amount = principal + interest amount received in 2 years = principal + 1200 4000 - 1200 = 2800 principal = 2800 interest = 600 Rate of interest = (600/2800) × 100 = 21(3/7)%
- The speed of a boat in still water is 8 km/hr more than that of the current. The time taken by the boat to travel 288 km downstream and 96 km upstream, tog...
Speed of boat is 10 km/hr. Speed of the stream is 20% less than speed of boat. Then find time taken by boat to go 90 km downstream?
- The current age ratio of Aman and Arjun is 3:4, respectively. After 6 years, their ages will be in the ratio 4:5. What is Aman’s present age?
The ratio between the time taken by a boat to cover a certain distance in upstream and the same distance in downstream is 5:1 respectively. The same boa...
A boat can cover 120 km in upstream in 15 hours and 135 km in Downstream in 5 hours. Find the speed of boat in still water.
A boat moves at 40 km/hr downstream and 10 km/hr upstream. How long will it take to cover 150 km in still water?
If a man rows at the rate of 14 kmph in still water and his rate against the current is 5 kmph, then find the man’s speed with downstream.    ...
The downstream speed of a boat is 75% greater than its upstream speed, and the speed of the stream is 3 m/s. How far can the boat travel in still water ...
A man swims downstream 60 km and upstream 36 km, taking 12 hr each time. Find the man’s rate in still water?  Â
A boat takes 20 hours to cover 'n' km in still water. While traveling downstream, it takes 15 hours to cover (n - 50) km. If the speed of the boat in st...
Relevant for Exams:
