- Math »
- If a and b together can complete a piece of work in 15 days and b alone in 20 days, in how many days can a alone complete the work?

# If a and b together can complete a piece of work in 15 days and b alone in 20 days, in how many days can a alone complete the work?

If a and b together can complete a piece of work in 15 days and b alone in 20 days, in how many days can a alone complete the work? The Correct answer is 60

by J Nandhini

**Updated **Feb 26, 2024

## If a and b together can complete a piece of work in 15 days and b alone in 20 days, in how many days can a alone complete the work?

The Correct answer is **60**

**Explanation**

(A+B) complete a work in 15 days.

⇒ One day's work of (A+B)=115

B completes the work in 20 days.

⇒ One day's work of B=120

Now, one day's work of A

=1/15−1/20=1/60

Thus, A can complete the work in 60 days.

## Multiplication Tables and Patterns

Multiplication tables are a structured way of representing the results of multiplying numbers. They are typically arranged in a grid, with the numbers 1 through 10 (or 12) along the top and left side. The intersection of each row and column in the grid represents the result of multiplying the numbers at the top and left side of that intersection.

Patterns in multiplication tables refer to recurring themes or sequences that can be observed when examining the numbers in the table. For example, in a standard multiplication table, you will notice that the numbers in each row or column increase by a consistent amount. Additionally, certain patterns emerge when looking at the products of specific numbers, such as the multiples of 2, 5, or 10 forming regular patterns.

Understanding these patterns can help with memorizing multiplication facts and developing a deeper understanding of how multiplication works. It can also be useful in solving more complex mathematical problems that involve multiplication.

## If a and b together can complete a piece of work in 15 days and b alone in 20 days, in how many days can a alone complete the work? - FAQ

1. If a and b together can complete a piece of work in 15 days and b alone in 20 days, in how many days can a alone complete the work?

The Correct answer is 60

## Recent Updates

- Two ships are sailing in the sea on the two sides of a lighthouse. The angle of elevati...
- A boatman can row 2 km against the stream in 20 minutes and return in 10 minutes. Find ...
- The numbers 33, 45 and 78, used in relation to vinyl records, refer to how much they co...
- A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 d...
- Jonathan and his sister Jennifer have a combined age of 48. If Jonathan is twice as old...
- The difference between the Compound interest and the Simple interest on a certain sum a...
- 12 men can complete a piece of work in 4 days. 15 women take 8 days to complete the sam...
- If a person walks at 14 km/hr instead of 10 km/hr, He would have walked 20 km more. The...
- Rs. 1200 is lent out at 5% per annum Simple interest for 3 years. Find the amount after...
- A works twice as fast as B. If B can complete a work in 12 days independently, The numb...
- Find the Simple interest on Rs. 5200 for 2 years at 6% per annum.
- The difference in Simple interest and Compound interest on a certain sum of money in 2 ...
- A plot of land has an area of 33.75 square feet. Jackson wants to put a 4-foot by 4-foo...
- A cuboid is of dimensions 60 cm × 54 cm × 30 cm. How many small cubes with side 6 cm ...
- Pipe A and B together can fill the tank in 12 hours. If the efficiency of pipe A is 37....