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Given that the diameter of a ping pong ball is 40 mm and a tennis ball has a diameter of 6.8 cm, what is the ratio of the ping pong ball to the tennis ball.
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Given that the diameter of a ping pong ball is 40 mm and a tennis ball has a diameter of 6.8 cm, what is the ratio of the ping pong ball to the tennis ball.

User Adam Sills
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1 Answer

4 votes
First write them both with the same units, then compare.

1: convert both into mm
>> Ping pong = 40mm,
>> Tennis = 6.8*10=68mm

2. Compare
>> (Ping pong)/(tennis) = 40/68 = 10/17
User Geekchic
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