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  • A does 20% less work than B. if A can complete a piece of work in 7 ½ hours, then B can do it in
Question 1:
A does 20% less work than B. if A can complete a piece of work in 7 ½ hours, then B can do it in
A. 5 hours
B. 5 1/2 hours
C. 6 1/2 hours
D. 6 hours
Feedback B Can finish the work in 80% of 7 ½ hours of time 7 ½ = 15/2
Therefore, time taken by B = .8 × 15/2 = 30/5 = 6 hours.

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