Question

John can wash a car in 10 minutes. Brad can wash the same car in 8 minutes. How long will it take them if they work together to wash a car?

Answer 1

Answer:

9 min

Step-by-step explanation.

half of ten is 5 and half of 8 is 4 and 4 + 5 = 9

Answer 2

Answer:

9⁄40 minute

Step-by-step explanation:

⅛ + ⅒ → 5⁄40 + 4⁄40 = 9⁄40 [Find the Least Common Denominator (LCD), which is 40]

You add these proportions together to get a "'together' time".

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