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16 March, 23:13

Marvin spent 3.4 hours which is 40% of his time at the recreational center playing ping pong. How long was Marvin at the recreational center?

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Answers (2)
  1. 17 March, 01:39
    0
    = 8.5 hours

    = 8 hours 30 minutes

    Step-by-step explanation:

    Full time spent = 100%

    If 40% = 3.4 hours,

    What about 100% = ?

    = (100 x 3.4) : 40

    = 340 : 40

    = 8.5 hours
  2. 17 March, 02:09
    0
    Marvin spent 10 hrs 12 min at the recreational center.

    or 10.2 hrs

    Step-by-step explanation:

    3.4 hrs = 40% of x

    3.4*2 = 80% of x

    6.8 = 80% of x

    6.8 + (1/2 * 6.8) = 100%

    6.8 + 3.4 = 100%

    10.2 = 100%
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