if A completes a piece of work in 20 hours and B does 1/30 of the work in 1 hour,what fraction of work will be completed in 6 hours if they work together??
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for A....
20 hr= 1 work
1 hr = 1/20 work
for B....
1 hr= 1/30 work
when both work together
1 hr = 1/20 +1/30 =5/60= 1/12
so 6 hr= 1/12×6= 1/2
when they work together they complete half of the work.....
20 hr= 1 work
1 hr = 1/20 work
for B....
1 hr= 1/30 work
when both work together
1 hr = 1/20 +1/30 =5/60= 1/12
so 6 hr= 1/12×6= 1/2
when they work together they complete half of the work.....
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