Question
A and B can complete a task together in 24 days, while B
alone takes 48 days to finish it. A began working alone and left after ‘x’ days, after which B completed the remaining work in 36 days. Determine the percentage of the total work completed by A.Solution
Let total amount of work be 48 units
Efficiency of (A + B) = 48/24 = 2 units/day
Efficiency of ‘B’ = 48/48 = 1 unit/day
Amount of work done by ‘B’ = 36 × 1 = 36 units
Percentage of work done by ‘A’ = {(48 – 36)/48} × 100 = 25%
Sara deposited Rs. 18,000 into an investment that offers a compound interest rate of 20% per annum, with semi-annual compounding. Calculate the interest...
Raj invests a certain amount, which grows to Rs. 7,200 at the end of 2 years and further increases to Rs. 8,640 at the end of 3 y...
A property dealer bought a rectangular plot in Noida five years ago at the rate of Rs. 1000 thousand per square meter, the cost of plot increases by 5% ...
Digvijay takes a loan of ₹25,000 at an annual compound interest rate of 10%. He repays ₹4,000 at the end of each year. How much should he pay at the...
The compound interest on a certain sum in 2.5 years at 10% p.a., interest compounded yearly, is 1,623. The sum is:
A sum of money invested at a certain rate of compound interest per annum amounts to ₹86,800 in 2 years and to ₹95,4800 in 3 years. Find the rate of ...
A man invests ₹50,000 in a scheme offering compound interest at 10% per annum, compounded annually. He withdraws ₹25,000 after 2 years. If he lets t...
A sum of money amounts to ₹12,960 in 2 years at compound interest. If the rate of interest is 10% per annum, what is the principal amount?
A sum of money is invested at a rate of 12% per annum compound interest for 2 years. If the total amount after 2 years is ₹11,520, what is the princip...
Raman invested Rs. 70,000 in a bank offering 10% compound interest per annum for 2 years. After 2 years, he used the total amount to start a business wi...
Relevant for Exams:
