Question

A,B and C can do a job in 12h,20h and 30h respectively.If they all work together,how long will they take to complete the job?

Answer 1

Step-by-step explanation:

First you take out the LCM of 12,20,30

then the LCM answer will be your answer of the question how long will they take to complete the job

Answer 2

Answer:

=12

Step-by-step explanation:

LCM of 12,20,30

=12