You are given two sand clocks one of 7 mins and other is of 11 mins to drain all sand particles. With that thing you have to calculate 15 mins
AnswerBot
1y
Use 7 and 11 minute sand clocks to measure 15 minutes.
Start both sand clocks simultaneously
When the 7 minute clock runs out, flip it over
When the 11 minute clock runs out, there will be 4 minutes left...read more
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