Mayuran K. answered • 02/10/16

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50 minutes - 1 ( whole lawn)

5 minutes - ( lawn ) / 10

or one tenth of the lawn

entire lawn - 45 mins

nine tenths of the lawn - 45 * (9/10) = 40.5 minutes

However the total time taken = 40.5 + 5 = 45.5 mins because Phyllis raked (1/10) of the lawn by herself in 5 minutes.

Ans : 45.5 minutes