Yah can do a piece of work in 20 days and b can do it in 30 days how long will they take to do the work together
Answers
Answered by
1
Answer:
efiicencency ×time = work
Step-by-step explanation:
effi of Yay = 1/20per day
effi of B = 1/ 30 per day
together = 1/20+1/30
3+2/60 = 5/60= 1 /12
and is 12
Answered by
1
Step-by-step explanation:
for A
In 20 days A can do 1 word
in 1 day A can do 1/20 work
for B
in 30 days B can do 1 work
in 1 day B can do 1/30 work
now
A and B together in 1day can do
(1/20+1/30)work
=(3+2)/60 work
=5/60 work
=1/12work
1/12 work can be done by A and B in
1 day
1 work can be done by A and B in
1/1/12days
=12days
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