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Toni loves dumplings. She can eat 32 of them in an hour. Her brother Paul needs three hours to eat the same amount.
How long will it take them both together to eat 32 dumplings?
And how long would it take them both together to eat 40 dumplings?
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THE
SOLUTION
If Toni eats three times as fast as Paul, she must be able to eat three times as many dumplings as her brother. Therefore, she must be able to eat 24 while he eats 8, 32+4 equals 8. But here were asked to measure time. We want to know how long it took Paul and Toni to eat the dumplings. The 24 and 8 respectively took 45 minutes.