। 6.(c) 10 days (d) 12 daysA can do a piece of work in 12days and B

1.	। 6.(c) 10 days (d) 12 daysA can do a piece of work in 12days and B in 15 days. Howmany days will both take to-gether to complete the work?A एक काम को 12 दिनों में तथा B15 दिनों में कर सकता है। दोनोंमिलकर उस काम को कितने दिनों मेंपूरा करेंगे?1h8 dans
Answer» A alone can do the work in 12 days He can do = 1/12 work in one day B alone can do the work in 15 days He can do = 1/15 work in one day A and B together can do = 1/12 + 1/15 = (5+4)/60 = 9/60 work in 1 day. They need days to finish the work = 1/(9/60) = 60/9 days.

। 6.(c) 10 days (d) 12 daysA can do a piece of work in 12days and B in 15 days. Howmany days will both take to-gether to complete the work?A एक काम को 12 दिनों में तथा B15 दिनों में कर सकता है। दोनोंमिलकर उस काम को कितने दिनों मेंपूरा करेंगे?1h8 dans

Answer»

A alone can do the work in 12 days He can do = 1/12 work in one day

B alone can do the work in 15 days He can do = 1/15 work in one day

A and B together can do = 1/12 + 1/15 = (5+4)/60 = 9/60 work in 1 day.

They need days to finish the work = 1/(9/60) = 60/9 days.