100 The manual harvesting efficiency of farmers is 100x hectare/hour.
Harvesting 10 hectares takes 10/ 100 hours.
It takes a harvester to harvest 10 hectares 10/ 150x hours.
Fractional equation:
( 10/ 100 x)-( 10/ 150 x)= 1
Multiply the equation by 300 times at the same time, and you will get:
30-20 = 300 times
x= 1/30
Then the harvesting efficiency of a harvester is 150x hectares/hour = 150x 1/30 = 5 hectares/hour.
This harvester harvests 5 hectares of wheat every hour.