Let speed of boat in upstream and downstream be ‘7x’ km/h and ‘9x’ km/h respectively. 70/7x + 144/9x = 13 10/x + 16/x = 13 26 = 13x x = 2 Speed of boat in still water = (7x + 9x)/2 = 8x = 8 × 2 = 16 km/h Desired time = 180/16 = 11.25 hours
If a sum of Rs. 6,500 is to be borrowed for 2 years at 10% per annum compounded half-yearly, find the compound amount (integer values only).
The interest earned when a sum is invested at simple interest of 20% p.a., for 3 years, is Rs. 3000. What will be the total amount received after 2 year...
Shivam invested 24000 at 8% p.a. simple interest for ‘x’ months. If at the end of ‘x’ months, he received a total amount of Rs.27200. What is th...
What is the principal amount?
Statement I: The Simple Interest after 2 years on a certain sum at 10% p.a is Rs. 1200.
Statement II : T...
A man invests Rs X in a scheme at 12% rate of interest for 8 years. After 8 years he reinvests the amount received at same rate of interest for same tim...
Find the approx. compound interest on Rs. 5000 at 4% per annum for 2 years compounded half yearly?
At what % of simple interest per annum will Rs. 600 amount to Rs. 780 in five years?
A woman lent Rs. 29500 at 13% p.a. compound interest, compounded annually for two years. After two years, the total amount earned by the woman is again ...
A sum fetched a simple interest of ₹3,040 at the rate of 8 %.p.a. in 5 years. What is the sum?
A man deposited 20% of his salary to a bank which offers compound interest at the rate of 10% p.a. If the interest earned by him from the bank after 2 y...
