Question

Mohan takes 8 days more than john to do a certain piece of work. together they can do it in 7.5 days. how many days will mohan take to do that work???

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Answer 1

Hyy Dude

Let the time taken by Ravi to finish the work be 'x' days, then Mohan takes 'x-8' days.

As Mohan and Ravi together can finish the work in 7.5 or 15/2 days, their 1 day work=2/15.

So, 1/x + 1/(x-8)= 2/15

(x-8+x)/[x(x-8)] =2/15

x^2 -23x+60 =0

(x-3)(x-20)=0

as x can't be 3, x=20,

Hope it's helps you

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Answer 2

Step-by-step explanation:

ans: 20 days

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