Question

surrender works a work in 1 hours and 30 minutes. surrender and suresh work this work in 1 hour. how long time will take suresh alone this work?

Answer 1

Suresh will do this work in 30 mins.

Answer 2

We first convert hours into minutes

surrender complete in 90 mins and surrender + suresh complete in 60 mins

LCM(90,60) is 180 units which we assume as the total work .

Now surrender complete 180/90=2 units of work per min........................eq1

Surrender + suresh complete 180/60=3 units of work per min......................eq2

from eq1 and eq2 Suresh=1 unit of work per min

So total time taken by suresh to complete the work will be 180/1=180 minutes or 3 hrs