Question
A plane flies a distance of 600 km in 2 hours. The speed
of a helicopter is 50% more than that of the plane, and the speed of a glider is 20% more than that of the helicopter. Find the difference between the time (in minutes) taken by the glider and the helicopter, to travel 50% more distance than flown by the plane.Solution
ATQ, 
A certain sum is invested for three years at rate of interest being 25% and it is invested in both simple interest and compound interest (compounded ann...
Raj invested equal amounts in two schemes x and y at compound interest. In scheme x, the rate of interest was 8% per annum and in scheme y the rate of i...
A man deposited Rs. 12000 at 10% compound interest, compounded annually while Rs. 10500 at 13% simple interest per annum. What will be the difference be...
An initial principal sum of Rs. 8000, invested by Pranav, accrued interest at a compound rate of 20% annually for a period of 2 years. Subsequently, the...
The simple interest on a sum of money is 8/25 of the sum. If the number of years is numerically half the rate per annum, then find the rate percent per ...
Ravi invests Rs. 2,000 on simple interest at 'a%' p.a. for 4 years and earned an interest of Rs. 800. His friend Vinay invests Rs. 4,800 on simple inter...
If the difference between the simple interest and compound interest, compounded annually, on Rs. 40,000 at (r + 4)% rate of interest for 2 years is Rs. ...
Rs. 25,000 invested at simple interest of 6% p.a. yields the same interest after 2 years as Rs. 40,000 when invested at simple interest of 'y%' p.a. yie...
A sum was put at simple interest at a certain rate for 7 years. Had it been put at 6 % higher rate, it would have fetched Rs. 1260 more. Find the sum?
A person lent Rs. 40000 at 8% p.a. compound interest, compounded annually for two years. After two years, the total amount earned by the person is again...
