A is $50\%$ more efficient than B. If B takes $18$ days to complete a work, A will take:
Practice this question from Chapter Mock 7: Time and Work, Pipe and Cistern, with options and an explanation.
Question
A is $50\%$ more efficient than B. If B takes $18$ days to complete a work, A will take:
Option A
10 days
Option B — Correct answer
12 days
Correct choice.
Option C
14 days
Option D
15 days
Explanation
$50\%$ more efficient means A works at $1.5$ times B’s rate. Time is inversely proportional, so A takes $18\div1.5=12$ days.