Question
24 men can complete a task in 16 days. 32 women can
complete the same task in 24 days. 8 men and 8 women start working together and work for 8 days. How many more men are required to complete the remaining work in 4 days?Solution
Given: 24 men → 16 days → total work = 384 man-days 32 women → 24 days → total work = 768 woman-days So, 1 man = 2 women Work done by 8 men + 8 women in 8 days 8 women = 4 men ⇒ total = 8 + 4 = 12 men Work = 12 × 8 = 96 man-days Remaining work Total = 384 man-days Done = 96 Left = 384 – 96 = 288 man-days Men needed to finish in 4 days 288 ÷ 4 = 72 men Already have 8 men ⇒ Extra men = 72 – 8 = 64
A certain sum of money invested at R% p.a. fetches a compound interest (compounded annually) of 1525.5 and simple interest of Rs.1500 at the end of 2 ye...
Naina lent Rs. 9,800 to Mohini for 4 years and Rs. 8,800 to Mitali for 6 years on simple interest at the same rate of interest and received Rs. 11,040 i...
A person invested a sum of Rs. 9000 at r% per annum at simple interest and a sum of Rs. 13500 at (r-4)% at simple interest. If total interest earned on ...
A sum of money doubles itself in 5 years in how many years it will be 3 times?
What will be the ratio of simple interest earned by certain amount at the same rate of interest for 4 years and 6 years ?
Find the total amount returned by Manish to the bank at the end of three years, when Rs.24000 is borrowed at the rate of (25/2)% compounded annually?(ca...
Simica invested a certain amount of money at a simple interest rate of 12.5% per annum and earned Rs. 2,400 as interest over 3 years. If Tabu invested t...
A sum of money lent at 5% rate of simple interest. The difference between interest for 6 years and 4 years is Rs. 2000. Find the principal amount.
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...
If Rs. 15000 is invested at 14% per annum, compounded yearly, calculate the interest earned in one year.
