it takes 4 hours for Andrew to repair his car, Ben can do the same in 6 hours, how many hours dose it take for them to do it if they are working together?
Answers
Answered by
1
rate of time taken by andrew=1/4
rate of time taken by ben=1/6
rate of time taken by both of them=(1/4+1/6)
=5/12hours
Answered by
1
Answer:
12/5 Hours
Step-by-step explanation:
According to the question
Time is taken by Andrew to repair his car = 4 hours
Time is taken by Ben to repair Andrew's car = 6 hours
We have to find out LCM for both 4 and 6 hours
that will be 12
=12 units of work
work done by Andrew in 1 hour =12/4=3 Units
work done by Ben in 1 hour=12/6=2 Units
work done by both Andrew and Ben in 1 hour= 3 +2 =5 units
so time taken by both Andrew and Ben to repair the car = total work/work done by both Andrew and Ben in 1 hour
=12/5
ans will be 12/5 hours
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