Question
Pipes ‘D’ and ‘E’ alone can fill a tank in 16
minutes and 24 minutes, respectively, while pipe ‘F’ can empty the same tank in 48 minutes. If all three pipes are opened together, then find the time taken to fill the tank.Solution
ATQ,
Let the capacity of the tank be 96 litres {LCM (16, 24, and 48)}
Efficiency of pipe ‘D’ = (96/16) = 6 litres/minute
Efficiency of pipe ‘E’ = (96/24) = 4 litres/minute
Efficiency of pipe ‘F’ = (96/48) = 2 litres/minute
Required time = {96 / (6 + 4 – 2)} = 12 minutes
The simple interest earned on ₹3,000 at a rate of 8% per annum for 4 years is ₹x. If ₹2,520 is the simple interest earned on ₹5,000 at a rate of...
- Rs. 3,300 is put into a savings scheme at a simple interest rate of 36% per annum for 3 years. The maturity amount is then invested in a business venture t...
A sum fetched a simple interest of ₹3,040 at the rate of 8 %.p.a. in 5 years. What is the sum?
Find the approx. compound interest on Rs. 5000 at 4% per annum for 2 years compounded half yearly?
‘P’ invested Rs. 5000 for (y + 3) months, while ‘Q’ invested Rs. 1500 more than ‘P’ for (y - 1) months, in a business. If profit received by...
- Waqar borrowed Rs. ____ on compound interest at 15% p.a. compounded annually. After __ years, the rate of interest changed to 20%. At the end of 4 years, h...
A certain amount, when invested at a simple interest rate of 18.2% per annum, grows to Rs. 14,552 in 4.5 years. What is the initi...
Aman invested Rs. 6,500 in scheme ‘Alpha’ which offered compound interest compounded annually at 10% per annum for 3 years. He also put Rs. ‘P’ ...
- A certain sum of money amounts to ₹3360 at a rate of R% per annum under simple interest after 5 years, and to ₹3480 at a rate of 15% per annum under si...
Nisha deposited Rs. ‘P’ in a bank offering compound interest of 11% p.a. compounded annually. After 2 years, she invested the amount received from t...
Relevant for Exams:
Hey, Don't leave. If you have any queries regarding any exam let us know here.
