1.

If 4 girls takes 2(1/2) hours to complete a job, how much time is required for 3 girls to finish the job, working at the same rate of performance?

Answer»

Answer:

ANS =1day

Step-by-step explanation:

Time taken by 5 CHILDREN to COMPLETE the job =

5

20

days =4 days

∴ Time taken by 4 men to complete the job =(4×2) days =8 days

Time taken by 4 women to the complete the job =(8×2) days =16 days

Therefore, 5 children's 1 day's work =

4

1

4 men's 1 day's work =

8

1

4 women's 1 day's work =

16

1

∴ (12 men's + 10 children's + 8 women's )

1 day's work =3× (4 men's 1 day's work) +2× (5 children's 1 day's work) +2× (4 women's 1 day's work)

=3×

8

1

+2×

4

1

+2×

16

1

=

8

3

+

2

1

+

8

1

=

8

8

=1

∴ Required time =1 day.

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