Question

plz explain me that when a wall is build in 10 hours by 8 men then how 1 man take 80hrs....​

Answer 1

Answer:

While attempting those type of questions you should know that ... more men would take less time to do the work and less men would take more..

so,

8 men -> 10hrs

1 men -> 8 × 10hrs = 80 hrs

Hope so it helps :)

Answer 2

Its basically a problem of inverse proportion

When no. of people(n) are less time taken(t) will increase because less people are doing the same work whereas more people doing the same work will take less time.

So, n is inversely proportional to t.

When two variables are in inverse proportion, then their product is a constant.

So when 8 men build wall in 10 hours

1 man will build wall in (8×10)=80 hrs

Here in the first case 10×8=80 and in the second case as the product is a constant

80=1×no. of hours 1 man will take

so, no. of hours 1 man will take=80 hrs