Suraj can complete a work in 3 days while Rajesh can complete the same work in 4 days. How many days will it take to complete the work if both Suraj and Rajesh work together?
Answers
Suraj ans Rajesh Work together is :
Suraj complete a piece of work in 3 days
Rajesh complete a piece of work in 4 days
First we take LCM of these numbers 3 , 4
so, LCM is 12 ( total work is 12 )
Suraj complete whole work in 3 days and total work is 12
then Suraj complete work in 1 day = 12/3 = 4 (efficiency of Suraj )
Rajesh complete whole work in 4 days and total work is 12
then Rajesh complete work in 1 day = 12/4 = 3 (efficiency of Rajesh )
now ,
Efficiency of suraj is 4
and Efficiency of Rajesh is 3
now , Suraj + Rajesh = 4 + 3 = 7
so , total work = 12
Suraj + Rajesh = 12/7 days
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