time and work type questions
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A can do a bit of work in 8 days, which B alone can do in 10 days in how long . In how long both cooperating can do it?
A - 40/9 days
B - 41/9 days
C - 42/9 days
D - 43/9 days
Answer - A
Explanation
A's 1 day work= 1/8, B`s 1 day work = 1/10
∴ (A+B) 1 day work = (1/8+1/10) = 9/40
Both cooperating can complete it
A - 40/9 days
B - 41/9 days
C - 42/9 days
D - 43/9 days
Answer - A
Explanation
A's 1 day work= 1/8, B`s 1 day work = 1/10
∴ (A+B) 1 day work = (1/8+1/10) = 9/40
Both cooperating can complete it
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