At the car dealership, one person can clear a car in 3 hours. Another person can clean that same car in 4 hours. Which equation can be used

Question

At the car dealership, one person can clear a car in 3 hours. Another person can clean that same car in 4 hours. Which equation can be used to find the total time, t, in hours, it will take the two people to clean one car by working together?

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Ariana 8 hours 2021-09-11T05:19:52+00:00 1 Answer 0

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    2021-09-11T05:21:28+00:00

    Answer:

    The value of time required to clean the car by both persons working together = 1.714 hours

    Step-by-step explanation:

    Time taken by first person to clean the car T_{1} = 3 hours

    Time taken by second person to clean the car T_{2} = 4 hours

    Time taken by both persons to working together  T = \frac{T_{1} T_{2}  }{T_{1} + T_{2}}

    Put the values of T_{1} & T_{2}  in above formula we get,

    ⇒ T = \frac{12}{7} hours = 1.714 hours

    This is the value of time required to clean the car by both persons working together.

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