A can finish a piece of work in 24 days. B is 20% more efficient than A. C is 25% more efficient than B. In 110w many days B and C together can finish the same piece of work ?


A) 8 \( \Large \frac{8}{9} \)

B) 9 \( \Large \frac{1}{3} \)

C) 8 \( \Large \frac{5}{8} \)

D) 10 \( \Large \frac{2}{9} \)

E) 9 \( \Large \frac{1}{6} \)

Correct Answer:
A) 8 \( \Large \frac{8}{9} \)

Description for Correct answer:
The efficiency of A = \( \Large \frac{1}{24} \)

The efficiency of B = \( \Large \frac{1}{24} \) X \( \Large \frac{120}{100} \) = \( \Large \frac{1}{20} \)

The efficiency of C = \( \Large \frac{1}{20} \) X \( \Large \frac{125}{100} \) = \( \Large \frac{1}{16} \)

Work done by B and C in 1 day = \( \Large \frac{1}{20} \) + \( \Large \frac{1}{16} \)

= \( \Large \frac{4 + 5}{80} \) = \( \Large \frac{9}{80} \)

B and C complete the work in = \( \Large \frac{80}{9} \)

= 8 \( \Large \frac{8}{9} \) days

Part of solved IBPS PO-Prelims1 questions and answers : Exams >> Bank Exams >> IBPS PO-Prelims1








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