Question

4 people can dig a trench in 3 hours how long will it take 9 people

Answer 1

If four people takes 3 hrs ,

1 people will take = 3*4=12hr.

therefore 9 people do it, it will take = 12/9 hrs

=1.3 hrs

which is 1 hr 20 min.

hope it is helpful.

Answer 2

It will take 1.3 hours to dig 9 people

Step-by-step explanation:

Time taken by 4 people to dig trench = 3 hours

We are supposed to find the how long will it take 9 people

Time taken by 1 people to dig trench = $3 \times 4 = 12 hours$

Time taken by 9 people to dig trench = $\frac{12}{9}= 1.3 hours$

Hence It will take 1.3 hours to dig 9 people

#Learn more:

10 people can dig a trench in 6 days. How many people can dig it in 4 days

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