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7 March, 18:19

If a heart beats 65 times in one minute, then how many times does a heart beat in 72 seconds?

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  1. 7 March, 18:41
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    1 minute = 60 seconds.

    In 60 sec, a heart beats 65 times.

    In 1 sec, a heart beats 65/60 times.

    In 72 sec, w heart beats (65*72) / 60 times

    = 4680/60 times

    = 78 times.
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