The day after tomorrow is my exam please help me fast
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1 = B, 2= a, 3=C, 4 =a , 5=c this is multiple choice question and your answer
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Answer:
A can do a work in 45 days. He works at it for 15 days and then, B alone finishes the remaining work in 24 days. Find the time taken to complete 80% of the work if they work together.
Solution:
A can do a work in 45 days.
A’s 1 day work = 145
∴ A’s 15 days work = 15 × 145 = 13
Remaining work = 1 – 13 = 23
B alone completes the remaining 23 work in 24 days
∴ B completes the whole work in 2423 days = 24 × 32 = 36 days.
∴ B’s 1 day’s work = 136
∴ (A + B)’s together complete the work in aba+b days = 45×3645+36 = 45×3681
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