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A and B together can do a piece of work in 30 days. A having worked for 16 days, B finishes the remaining work alone in 44 days. In how many days shall B finish the whole work alone?
  • a)
    30 days
  • b)
    40 days
  • c)
    60 days
  • d)
    70 days
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A and B together can do a piece of work in 30 days. A having worked fo...
Let A's 1 day's work = x and B's 1 day's work = y
Then, x + y = 1/30 and 16x + 44y = 1
Solving these two equations, we get x = 1/60 and y = 1/60
Hence, B alone shall finish the whole work in 60 days
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Most Upvoted Answer
A and B together can do a piece of work in 30 days. A having worked fo...
Let's assume that A's work rate is "a units/day" and B's work rate is "b units/day".

Given information:
- A and B together can do a piece of work in 30 days.
- A having worked for 16 days, B finishes the remaining work alone in 44 days.

Work done by A in 16 days = 16 * a units
Work done by B in 44 days = 44 * b units

The total work done by A and B together is equal to the work done by A in 16 days plus the work done by B in 44 days.

Total work done by A and B = 16a + 44b

We also know that A and B together can do the work in 30 days.

So, the work done by A and B in 30 days = 30 * (a + b)

Since the total work done by A and B is equal to the work done by A and B together, we can equate the two equations.

16a + 44b = 30(a + b)

Simplifying the equation, we get:

16a + 44b = 30a + 30b
14a = 14b
a = b

This implies that A and B have the same work rate.

To find the work rate of B, we can substitute the value of a or b in any of the above equations. Let's substitute a = b:

16a + 44a = 30(a + a)
60a = 60a
a = a

We can see that the work rate of A and B is the same, which means they can do an equal amount of work in a day.

Since A and B together can finish the work in 30 days, and we know that A has already worked for 16 days, B will take the remaining days to finish the work alone.

Number of days B will take to finish the remaining work = 30 - 16 = 14 days

Therefore, B will take 14 days to finish the whole work alone.
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A and B together can do a piece of work in 30 days. A having worked for 16 days, B finishes the remaining work alone in 44 days. In how many days shall B finish the whole work alone?a)30 daysb)40 daysc)60 daysd)70 daysCorrect answer is option 'C'. Can you explain this answer?
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