Problema Solution
Jack usually mows the lawn in 5 hours. Marilyn can mow the same lawn in 4 hours. How much time would it take to mow the lawn together?
Answer provided by our tutors
let 'x' the hours they need to mow the lawn together
1/5 + 1/4 = 1/x
by solving we find
x = 20/9 hr
x = 2 hr 2*60/9 min
x = 2 hr 13.3 min
x = 2.22 hr
click here to see the step by step solution of the equation
it will take 2.22 hours or about 2 hr and 13 min to mow the lawn together.