3 persons complete a work in 12 days working 4 hours each day. 4 persons will complete the same work in how many days by working 9 hours each day
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3×12×4 means the total work by all the person throught 12 days for 4 hours each day which is 144 units
days is now equal to 144/4×9 which is 4
so.. 4 days will be taken
days is now equal to 144/4×9 which is 4
so.. 4 days will be taken
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