Given: Number of pumps required to fill a tank in 1.5 hours = 5
To find: Number of pumps require to fill the tank in 0.5 hours
Substituting x1 = 1.5, y1 = 5 x2 = 0.5 in the formula,
Gives y2 = 15 pumps
∴ 15 pumps are required to fill the tank in 0.5 hours.
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