Question

5. A man takes 15 minutes to wash 3 shirts and 30
minutes to wash and dry 4 shirts and 5 vests. If he
takes 30 minutes to only wash 2 shirts and 10 vests,
then what is the time taken for drying ?
(A) 5 minutes (B) 15 minutes
(C) 10 minutes (D) 0 minutes
(E) None of these​

Answer 1

Answer:

B)15 minutes..✔✔

Explanation:

Answer 2

15 mins to wash 3 shirts, so 5 mins/shirt washed

30 mins to wash 2 shirts & 10 vests, so (30 - 2*5)/10 = 2 mins/vest washed

30 mins to wash AND dry 4 shirts & 5 vests

time needed for washing = 5*4 +2*5 = 30 mins,

so time neededs for drying = 0 mins <-------

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