Question
A train takes 30 minutes to travel 20 km, but due to
maintenance, its speed is reduced by 25% for the next 10 km. Find the total time taken by the train to cover 30 km.Solution
Speed = 20/0.5 = 40 km/h New speed = 40 × 0.75 = 30 km/h Time = 10/30 = 1/3 hour = 20 minutes Total time = 30 + 20 = 50 minutes Answer: b) 50 minutes
John borrowed some money from Alex at 10% simple interest per annum. He lended this money to Shaun at 20% compound interest per annum, and made a profit...
The simple interest on a sum of money is 9/35 of the sum. If the number of years is numerically 5/7 times of rate percent per annum, then the rate perc...
The simple interest on a sum of Rs X in 5 years is (2/5)of the principal. What is the annual rate of interest?
Raj invested Rs. ‘5y’ in scheme ‘C’ offering simple interest of 20% p.a. and reinvested the interest earned from scheme ‘C’ at the end of 3 ...
'S' allocated 40% of his monthly income to SIP P, where it accrues a simple interest of 18% p.a. The remaining 60% was directed to SIP Q, with a compoun...
A man invested certain sum at 10% p.a. simple interest for his son who was 17 years old. If the amount received by the son when he was 30 years old is R...
Rajan invested Rs. 18,000 in a scheme offering x% p.a. simple interest for x years. Interest earned by him after ‘x’ years is Rs. 11520. Find the in...
A borrowed Rs. 6500 from B for his business. How much amount A will return to B at the end of 48 months such that the sum was borrowed at simple interes...
Sameer invested Rs. (R + 1000) at simple interest of 20% p.a. for 3 years. Ajeet invested Rs. (R - 4000) at compound interest of 20% p.a. for 3 years. I...
Mr. X invested Rs. 900 in two schemes, A and B in the ratio of 7:3, respectively. Scheme A and B are offering simple interest at rate of 7% per annum an...
