Ask Question
6 April, 02:05

Can you measure a time interval of 7 minutes using two sandglasses of 5 and 8 min each? If so, how?

+1
Answers (1)
  1. 6 April, 05:09
    0
    It can be done.

    You must take a few steps to set it up, but then you are able to count 7 minutes. The setup makes you be able to time 2 minutes on the 5-minute sandglass and then you do another 5 minutes on the same sandglass.

    Setup:

    Start both sandglasses at the same time. When the 5-minute sandglass runs out, the 8 minute sandglass has 3 minutes of sand left. At this moment, start the 5 minute sandglass again.

    When the 8-minute sandglass finishes the remaining 3 minutes, the 5-minute sandglass has 2 minutes left.

    Actual timing of 7 minutes:

    Let the 2 minutes pass, and immediately turn over the 5-minute sandglass to count an addition 5 minutes. The last 2 minutes of the 5-minute sandglass plus an additional 5 minutes of the 5-minute sandglass add to 7 minutes.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Can you measure a time interval of 7 minutes using two sandglasses of 5 and 8 min each? If so, how? ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers