9. A और B दोनों एक काम को क्रमशः 10 तथा 15 दिनों में करते हैं।
A के दो दिन काम करने के पश्चात B शामिल होता है, तो शेष काम
कितने दिनों में समाप्त होगा?
Answers
Answered by
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Answer:
12 days
Step-by-step explanation:
let B will finish work in x days then,
2/10+ x/15=1
6+2x=30
2x=24
x=12 days
2nd method
A's one days work = 1/10 days
B's one day work= 1/15 days
so (a+b)'s 1 day work= 30/5=6 days
so we get by lcm method the total work is 30.
and A's 2 days work= 3×2=6
so balance work= 24 (done by B)
b's one day work= 2
so 24/2=12 days
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