Question
There are three taps of diameter 2 cm, 3 cm and 4 cm, respectively. The ratio of the water flowing through them is equal to the ratio of the square of their diameters. The biggest tap can fill an empty tank alone in 81 min. If all the taps are opened simultaneously, then how long will the tank take (in min) to be filled?
More Previous year papers Questions
- A man sold his bicycle for ₹810 losing two-fifth of its cost price. What is the loss percentage?
- The mean proportional between 2.8 and 0.7 is:
- A sum of money is distributed among P, Q, R and S in the ratio 3 : 4 : 5 : 6, respectively. If R gets ₹500 more than P, then the sum of all their shares (i...
- The average of first 6 positive multiples of 6 will be __________.
- Find the rate of interest if a sum of money becomes 8 times after 3 years when interest is being compounded annually.
- Abhinav bought some pencils for ₹ X. He sold 20% of pencils at 25% loss, one third at 20% profit and the remaining at 25% profit. If the total profit earne...
- P, Q and R can finish a work in 5 days, 10 days, and 15 days, respectively, working alone. P and Q works on first day, P and R works on second day and P an...
- The four walls and ceiling of a room of length 25 m, breadth 12 m and height 10 m are to be painted. Painter A can paint 200 m2 in 5 days, Painter B can pa...
- The cost price of an article is ₹600. A shopkeeper sells it for ₹680 after giving a discount of 15% on its list price. If he sells it after giving a discou...
- Solve the following: 240 ÷ 8 × 512 ÷ 4
Relevant for Exams:
Hey! Ask a query
Please enter email id
The email must be a valid email address.
Please enter Mobile Number
Please enter valid Mobile Number
Please enter your Doubt
