A carpenter takes 8hours to make an arm chair.while his assistant takes 12 hours to do the same job.working together how long would they take to make the armchair?
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may be they can do work in 4 hours
suryashrivastava205:
4hrs 48mins.....pls explain
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1
formula is a×b/a+b
8×12/8+12
96/20=4.8 hours
4.8 hours I think it's right
8×12/8+12
96/20=4.8 hours
4.8 hours I think it's right
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