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15 December, 11:14

Alan mows lawns in the summer to make money. He knows that, on average, he can mow 1/2 of a lawn in 1 1/4 hours. Calculate his average mowing rate in lawns per hour.

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  1. 15 December, 11:41
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    0.4 lawns per hour

    Step-by-step explanation:

    We are asked how long it would take on average to mow all the lawn per hour.

    We are told that you can mow half a lawn in 1 1/4 hours, that is to say in 1.25 hours, which means that to mow the lawn completely it must have an average of twice the time, that is:

    1.25 * 2 = 2.5

    Which means that on average it takes 2.5 hours to mow all the lawn.

    1/2.5 = 0.4 lawns per hour
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