Question

A, Band C can do a pice of work in 10 days class 8​

Answer 1

Answer:

7 days

Explanation:

Given A can do the work in 10 days ,B can do the work in 12 days and C can do the work in 15 days.

Then A's one day's work =

10

1

B's one day's work =

12

1

C's one day's work =

15

1

Then (A+B +C)'s one day's work =

10

1

+

12

1

+

15

1

=

1800

450

=

4

1

(A+B+C)'s two days' work =

4

1

×2=

2

1

But B leaves 3 days before the work gets finished, so C does the remaining work alone

C's 3 days' work =

15

1

×3=

5

1

Then work done in 2+3 days =

2

1

+

5

1

=

10

7

Work done by B+C together =1−

10

7

=

10

3

(B + C)'s one day work =

12

1

+

15

1

=

20

3

So number of days worked by B and C together=

10

3

×

3

20

=2 days

Then total work done =2+3+2=7 days

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