Multiple choice

Gurmeet's clock gains 4 seconds every 20minutes, it shall gain exactly how manyminutes in 25 hours ?

  1. 6

  2. 5

  3. 4

  4. 8

  5. 9
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In 25 hours there are 1,500 minutes. At 4 seconds gained every 20 minutes, the clock gains 75 x 4 = 300 seconds, which equals 5 minutes.

AI explanation

Using the unitary method for the fast clock, 20 minutes of real time equals 4 seconds of gained time. This means the clock gains 12 seconds every hour, so in 25 hours it gains 25 times 12 seconds, which is 300 seconds. Converting 300 seconds into minutes gives exactly 5 minutes.

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