Question

answer this question step by step???

Answer 1

Hope this helps you

Answer 2

STEP 1: Convert hours to minutes:

1 1/2 hour = 1 h 30 mins = 90 mins

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STEP 2: Find their work rate:

Gardener A = 90 mins

⇒ 1 min = 1/90 of the work done

Gardener B = 54 mins

⇒ 1 min = 1/54 of the work done

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STEP 3 : Find amount of work done in 1 min:

1 min = 1/90 + 1/54 = 4/135 of the work done.

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STEP 4: Find amount of work done in 18 mins:

1 min = 4/135

18 mins = 4/135 x 18 = 8/15 of the work done

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STEP 5: Find amount of work left:

Work left = 1 - 8/15 = 7/15 of work left

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STEP 6: Find amount of time Gardener A needs to finish up the rest of the work:

* Time needed = amount of work divided by the amount of work he can complete in 1 min.

Time needed = 7/15 ÷ 1/90 = 42 mins

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Answer: Gardener A needs another 42 minutes to finish up the work.