Question

Chapter Eleven - Work and Time
5. A does half as much work as Bis
three-fourth of the time. If together they
Take 18 days to complete the work, how
many days will B take to do it?
(a) 40 days
(br 30 days
(c) 45 days
(d) None of these​

Answer 1

Answer:

30 days

Step-by-step explanation:

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Answer 2

Answer:

Now, we know work efficiency is inversely proportional to time.

So, [WAWB]=[TBTA]

Or, [WAWB]=[11.5]

Or, [WAWB]=[23]

So, if A does 2 parts, B does 3 parts. Together they complete 5 parts in 1 day.

As they take 18 days to complete the work together, so,

TOTAL WORK = 90 parts

So, TB=TOTAL WORKWB

Or, TB=[903]

Or TB=30days (Answer)