Math, asked by rakshitham8n003, 1 day ago

naresh can do a piece of work in 15 hours while suresh can do it in 12 hours. how long will both take to do it working together?

Answers

Answered by 000harsh
2

Answer:

3 hours

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Answered by annabobi38
2

Answer:

Solution

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Correct option is

C

30 days

A's 1 days' work =

80

1

A's 10 days' work =

80

10

=

8

1

Remaining work =1−

8

1

=

8

7

8

7

of the work is completed by B in 42 days

∴ The whole work is completed by B in

7

42×8

days = 48 days

∴ B's 1 days' work =

48

1

(A + B)'s 1 days' work =

80

1

+

48

1

=

240

3+5

=

240

8

=

30

1

∴ A and B can complete the whole work together in 30 days

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