There are 630 dishes that need to be rinsed. boris can rinse them in 105 minutes by himself. it will take his friend reuben 70 m
inutes to rinse these dishes. how long will it take them if they rinse these 630 dishes together?
1 answer:
<u>Boris:</u>
105 mins = 630 dishes
1 min = 630 ÷ 105 = 6 dishes
<u>Reuben:</u>
70 mins 630 dishes
1 min = 630 ÷ 70 = 9 dishes
<u>Boris and Reuben:</u>
1 min = 6 + 9 = 15 dishes
<u>Number of numbers needed to rinse 630 dishes:</u>
630 ÷ 15 = 42 mins
Answer: They will take 42 mins if they rinse the 630 dishes together.
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