20 men can plant 50 sapplings in 8 hrs .in how many hours 15 men can plant 80 sappplings
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Time taken by 20 men to plant 50 saplings=8 hrs
or, time taken by 1 man to plant 50 saplings= 8*50 hrs = 400 hrs
or, time taken by 1 man to plant 1 sapling= 400/50 hrs = 8 hrs
or, time taken by 1 man to plant 80 saplings= 8*80 hrs = 640 hrs
or, time taken by 15 men to plant 80 saplings = 640/15 hrs = 42.67 hrs (Ans)
or, time taken by 1 man to plant 50 saplings= 8*50 hrs = 400 hrs
or, time taken by 1 man to plant 1 sapling= 400/50 hrs = 8 hrs
or, time taken by 1 man to plant 80 saplings= 8*80 hrs = 640 hrs
or, time taken by 15 men to plant 80 saplings = 640/15 hrs = 42.67 hrs (Ans)
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