in can wax her SUV in 2 hr. Clarann can wax the same SUV in 7 hr. If they work together, how long will it take them to wax the SUV? Write your answer as a ton or mixed number, if necessary.
To find the time it will take them to wax the SUV together, we can use the formula:
1/(time it takes both working together) = 1/(time it takes in) + 1/(time it takes Clarann)
1/(time) = 1/2 + 1/7
1/(time) = (7 + 2)/14
1/(time) = 9/14
time = 14/9 or 1 5/9 hours
Therefore, it will take In and Clarann approximately 1 hour and 40 minutes to wax the SUV together.