Problema Solution
Jack usually mows his lawn in 6 hours. Tom can now mow the same lawn in 4 hours. How much time it would take for them to mow the lawn together.
They could mow the lawn in __ hours if they mowed the lawn together.
Answer provided by our tutors
Jack mows his lawn in - 6 hours.
jack's per hour work is =1/6 times of lawn
Tom mow the same lwn in -4 hours.
Tom per hour works is = 1/4 times of lawn
Boths per hour work = 1/6 +1/4 = 5/12 times of lawn.
so time taken by both if mowed the lawn together is= 12/5 = 2.5 hours