Question

mechanics Rohan and Mohan working together can service a scooter in 6 hours Rone alone can do the job in 15 hours in how many marks can mohan do it alone​

Answer 1

Answer:

10

Step-by-step explanation:

Given  

Mechanics Rohan and Mohan working together can service a scooter in 6 hours Rohan alone can do the job in 15 hours in how many hours can mohan do it  alone

Number of hours Rohan required to service a scooter is 15 hours.

So number of hours Mohan can do will be x hours.

So together the work will be done in 6 hours.

Now work done by Rohan in one hour is 1/15

Work done by Mohan in one hour is 1/x

So together work done will be 1/6

Now work done together in one hour will be 1/15 + 1/x

                                                                    = x + 15 / 15 x

So x + 15 / 15 x = 1/6

 6x + 90 = 15 x

 15 x = 6x = 90

   9x = 90  

Or x = 10 hours

So Mohan can do the work in 10 hours