Multiple choice

A does a work in 72 days. B who is 20% more efficient will complete 40% work in how many days? A किसी कार्य को 72 दिनों में समाप्त करता है। B जोकि A से 20% अधिक कार्य कुशल है 40 प्रतिशत कार्य को कितने दिनों मे समाप्त करेगा?

  1. 20 days/दिन

  2. 24 days/दिन

  3. 30 days/दिन

  4. 36 days/दिन
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A completes work in 72 days, so A's rate = 1/72 per day. B is 20% more efficient, so B's rate = 1.2 × 1/72 = 1/60 per day. B completes 40% (0.4) of work: Time = 0.4 ÷ (1/60) = 24 days. Verify: In 24 days, B does 24/60 = 40% of work.

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