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31 December, 04:58

In 30 seconds, 2-year-old Janay's heart beats 36 times.

How many times will her heartbeat in 2 minutes?

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Answers (2)
  1. 31 December, 06:25
    0
    Answer: 144 beats

    Step-by-step explanation
  2. 31 December, 07:51
    0
    Answer: 144 times

    Step-by-step explanation:

    In 30 seconds, it beats 36 times

    Another 30 seconds - 36 times

    Another 30 seconds - 36 times

    Another 30 seconds - 36 times

    Therefore, in two minutes, it will beat, 36 + 36 + 36 + 36 times

    Therefore, it will beat 144 times.

    Another Approach

    30 Seconds - 36 times

    1 second - 36/30 times

    Since 120 seconds make 2 minutes, then

    120 seconds - 36 / 30 x 120

    = 144 times
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