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urs a day must 4 pumps5. Three pumps working 8 hours a day can empty a tank in 2 days. How many howork to empty the tank in I day?davs will he travel 156 km |
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Answer» Let the required number of working hours per day be x. More pumps, Less working hours per day (Indirect Proportion) Less days, More working hours per day (Indirect Proportion) Pumps 4 : 3 :: 8 : x Days 1 : 2 4 x 1 x x = 3 x 2 x = (3*2*8)/4X=12 days |
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