Question

5 persons can prepare an admission list in 8 days
working 7 hours a day. If 2 persons join them so
as to complete the work in 4 days, they need to
work per for​

Answer 1

Number of people = 5

Number of hours = 7

Number of days = 8

Number of people= 7

Number of days= 4

Number of hours=?

Using the formula ,

Work1×Time1×Day1=Work2×Time2×.

Day2

5×8×7 = 7 × 4 × x

280= 28x

x= 280 / 28 = 10

Thus they would have to work 10 hours a day.

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Answer 2

Answer:

They'll have to work 10 hours a day if they wish to complete the work in 4 days working with 7 people.

Step-by-step explanation:

This particular sum is an example of inverse proportion.

So as the number of people working increases the time that they'll need will decrease.

We are told that,

5 people complete the task in 8 days working 7hrs a day.

Therefore,

The time required = 8 × 7= 56 hrs

i.e. 5 people complete the task in 56 hrs.

Now,

With 7 people the time required = ( 5 × 56) ÷ 7 = 40hrs.

As per the given condition,

7 people complete the task in 4 days.

Therefore,

Time they will have to work for each day = 40 ÷ 4 = 10hrs per day