A kisi kaam ko 9 dino me tatha B ussi kaam ko 8 dino me pura kr skte h .yadi we bari bari se kaam krte h to we kull kitne dino me kaam krega
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work done by A in one day=1/9
work done by B in one day=1/8
work done by A and B together in one day= 1/8 + 1/9=17/72
time take to complete work = 72/17 = 4.23 days approx
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