Answered

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A gardener can trim all the bushes on the Green's property
in 5 hours. If his assistant helps him, they can complete the job
in 4 hours. How long would it take the assistant to do the job
alone?
(In hours)

Sagot :

It would take the assistant 20 hours to do the job alone.

How to determine the value

From the information given, we have that;

  • The gardener trims for 5 hours alone
  • The gardener and  assistant trims for 4 hours

Let the gardener be x

His assistant be y

So,

y = 1/ 5

x + y = 1/ 4

Substitute the value

x = 1/ 4 - 1/ 5

Find the LCM

x =  1 / 20

Take the reciprocal

x = 20 hours

Thus, it takes the assistant 20 hours to do the job alone.

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