0 votes
in Commercial Mathematics by (31.5k points)
closed by

A can do a piece of work in 14 days and B is 40% more efficient than A. In how many days can B finish it?

A. 10 days

B. \(7\frac{1}{2}\) days

C. \(5\frac{1}{4}\) days

D. \(5\frac{3}{5}\) days

1 Answer

+1 vote
by (31.0k points)
selected by
Best answer

Number of days required by A to finish the work : 14 days

Work done by A in one day: \(\frac{1}{14}\)

B can work 40% more efficiently than A,

∴ B's one day work = 140% of \(\frac{1}{15}=(\frac{140}{100}\times\frac{1}{14})=\frac{1}{10}\)

∴ B alone can complete the work in 10 days.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.