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Let the principal = Rs. x, Amount = Rs. 5x, Time = 20 years ∴ Simple Interest = Rs. (5x – x) = Rs. 4x Rate = [(4x × 100)/(x × 20)]% p.a. = 20% p.a. Now, Principal = Rs. x, Amount = Rs.2x, Rate = 20%p.a. Simple Interest = Rs. (2x − x)= Rs. x ∴ Time = (x × 100)/(x × 20) = 5 years.
A person has ₹5000. He invests 40% of it in scheme A at 8% per annum and the remaining in scheme B at 10% per annum. What is the total interest earned...
If 5m = 3125, then find the value of 4(m-3)
Rs. 8000 was lent in two parts, first part at 5 % p.a. and the remaining at 4% p.a. If the total simple interest from both the parts in 4 years was Rs. ...
A boat takes 8 hours to travel 42 km upstream and 81 km downstream combined. In another instance, it covers 48 km upstream and 54 km downstream in 7 hou...
Train P takes 24 seconds to pass a tree and 34 seconds to pass through a 150-meter-long tunnel. Train Q, which is 440 meters long...
A car covers a distance of 240 km at a speed of 60 km/h. It then covers another 180 km at a speed of 90 km/h. What is the average speed of the car for t...
The ratio of time taken by P, Q and R to complete work alone is 4:6:3 respectively. If all three together complete the work in 6 days, then find in how ...
A car covers a distance of 450 km at a constant speed. If the car’s speed had been 15 km/h faster, it would have taken 1 hour less to cover the same d...
Pipe P can fill a tank by itself in 16 hours, while pipe R can empty the tank in 36 hours when it is full. Together, pipes P and ...
In a general survey of 832 people, it was found that 624 owned a car. If a person is selected randomly, what is the probability that the person will not...