Problema Solution
Bethany can mow her family’s lawn in 4 hours. Her brother Colin can mow the lawn in 3 hours. Which equation can be used to find x, the amount of time it would take for Bethany and Colin to mow the lawn together?
Answer provided by our tutors
the rate of Bethany is: 1/4 lawns per hour
the rate of Colin is: 1/3 lawns per hour
the together rate is: 1/x lawns per hour
1/4 + 1/3 = 1/x
by solving we find:
x = 12/7
x = 1 5/7 hr
x = 1 hr 5*60/7
x = 1 hr 43 min
click here to see the step by step solution of the equation:
Bethany and Colin need 1 hour and 43 minutes to mow the lawn together.