Let the capacity of the tank be ‘150’ litres {LCM (25, 30)} Efficiency of pipe ‘A’ = (150/25) = 6 litres/minute Efficiency of pipe ‘B’ = (150/30) = 5 litres/minute Quantity of water filled by pipe ‘A’ in 18 minutes = 18 × 6 = 108 litres Quantity of water to be filled = 150 – 108 = 42 litres Time taken by pipe ‘A’ and ‘B’ together to fill 42 litres of water = {42/(6 – 1)} = 42 minutes Total time taken = 18 + 42 = 60 minutes
Bittu, Tittu and Mitthu invested Rs. 80000, Rs. 100000 and Rs. 120000 respectively to start a business. Partnership condition is that, each will get int...
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...
The simple interest received on a sum at the rate of 4 percent per annum is 3/5 of the sum. What is the time period?
A company declared 20% discount for wholesale buyers on an item. A wholesaler bought the item from the company for ₹400 after getting a discount. He f...
A sum of money lent at compound interest at the rate of 10% per annum is paid back in three equal instalments of Rs 3,993. Find the sum?
A man deposited Rs. 22000 at 10% compound interest, compounded annually while Rs. 21500 at 12% simple interest per annum. What will be the difference be...
A man invested certain sum at simple interest of r% p.a. such that it amounts to 124% of itself in 10 years. Find the interest earned when Rs. 10000 is ...
Ankit invested Rs. 12,000 in a scheme that offers compound interest at an annual rate of x%, compounded once a year. After 2 years, he received an inter...
Vikas invested Rs. 12,000 at an annual compound interest rate of 30%, with the interest being compounded annually after every 10 months. What is the in...
The simple interest on a sum of money is 9/20 of the sum. If the number of years is numerically half the rate per annum, then find the rate percent per ...
