Hourglass 83292

The hourglass ticks three times in 5 minutes. How many times do they spill in 2 hours?

Correct answer:

n2 =  72

Step-by-step explanation:

n1=3 t1=5 min t2=2 h min=2 60  min=120 min  n1:n2 = t1:t2 n2:n1 = t2:t1  n2=n1 t1t2=3 5120=53 120=5360=72



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