SOLUTION: Marukh can wash the car in 10 minutes. Steven can wash the car in 60 minutes. If Marukh and Steven work together, how long will it take them to wash the car? Round your answer to t
Question 893408: Marukh can wash the car in 10 minutes. Steven can wash the car in 60 minutes. If Marukh and Steven work together, how long will it take them to wash the car? Round your answer to the nearest minute.
Options:
25 minutes
9 minutes
70 minutes
Or
35 minutes
You can put this solution on YOUR website! Marukh can wash the car in 10 minutes. Steven can wash the car in 60 minutes.
If Marukh and Steven work together, how long will it take them to wash the car?
;
let t = time in minutes for them both to wash the car
let the completed job = 1; (a clean car)
:
Each will do a fraction of the job, the two fractions add up to 1 + = 1
multiply thru by 60, cancel the denominators and you have:
6t + t = 60
7t = 60
t = 60/7
t = 8.57 minutes working together
:
:
Check this with your calc: + =
