Question

sanjiv can do a piece of work in 15 hours while Rahim can do it in 12 hours how long will both take to do it working together

Answer 1

Answer:

sanjiv can do a piece of work in =15hours

rahim can do it in =12 hours

time will be taken by both together=15+12

ans=27 hours

Answer 2

Answer:  Step-by-step explanation Work done by Sanjiv in 1 hour=1/15 Work done by Rahim in 1 hour=1/12 Work done by Sanjiv and Rahim in 1 hour=1/15+1/12                                                                      =(15+12)/180                                                                      =27/180  It will take 180/27 hours to do a piece of work I.e, 6.67 hours.