Question
A train crosses a pole in 36 seconds and a platform in
52 seconds. If the speed of the train is 54 km/hr, then what is the length of the platform?Solution
Let the Length of train train be L meter and length of platform be P meter. Speed of train = 54 km/h = 54 × (5/18) = 15 m/s Here, (L /15) = 36 ⇒  L = 540 m Also, (540 + P)/15 = 52 ⇒  540 + P = 780 ⇒  P = 240 m
- Rs. 6,500 becomes Rs. 8,190 in 3 years at simple interest. Determine the rate of interest per annum.
How long will a sum of money take to double, if it is invested in 9% p.a. simple interest?(approx).
Alisha had Rs. 7500 with her. She invested 20% of the sum at 7% p.a. and the rest at 13% p.a., both at simple interest for 6 years each. Find the total ...
Sohan invested Rs. P in Scheme X at 20% per annum under simple interest for 3 years and Rs. Q in Scheme Y at 12% per annum under compound interest for 2...
The simple interest on a sum of Rs. (6x + 100) for 4 years at 10% per annum is Rs. 1,200. Find the value of x.
A sum of money amounts to ₹8700 in 2 years at a simple interest rate of 8% per annum. If the same sum is invested at compound interest with the same r...
Gaurav invested Rs. 9000 in a compound interest scheme for 2 years at an annual rate of q%. If he received Rs. 1980 as compound interest, find the rate ...
A invested Rs. ‘x’ in a scheme offering compound interest of 40% p.a. compounded annually. If at the end of 2 years, interest received by A was Rs. ...
If an amount of Rs. 'x' is invested at an annual compound interest rate of 20%, it grows to Rs. 'x + 2200' after 2 years. Calculate the value of 'x + 22...
A certain amount invested at 16% p.a. compound interest, compounded annually, grows to Rs. 6969.6 in 18 months. What wil...
Relevant for Exams:
