Multiple choice

If 3/5th of a cistern is filled in 1 minute, how much time will be required to fill the whole cistern?

  1. 100 sec

  2. 120 sec

  3. 140 sec

  4. 150 sec
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If 3/5 of the cistern is filled in 60 seconds, then 1/5 is filled in 20 seconds. The whole cistern (5/5) takes 5 * 20 = 100 seconds.

AI explanation

If 3 divided by 5 of the cistern is filled in 1 minute, the rate of filling is 3 divided by 5 of the cistern per minute. The total time to fill the whole cistern is found by dividing 1 by 3 divided by 5, which equals 5 divided by 3 minutes. To convert this time to seconds, multiply by 60, giving 5 multiplied by 60 divided by 3. This simplifies to 100 seconds.

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