Harvesters

The first harvester will harvest the grain from the field in 20 hours, the second, the more powerful in 10 hours. How long will take harvest this field by both harvesters, if the second harvester has to be set up first and this takes 2 hours? The first harvester then worked alone for two hours, then together.

Result

t =  8 h

Solution:


t/20 + (t-2)/10 = 1

3t = 24

t = 8

Calculated by our simple equation calculator.







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