Mohan can do a bit of work in 25 days which can be completed by Sohan in 20…

2023

Mohan can do a bit of work in 25 days which can be completed by Sohan in 20 days. Both together labour for 5 days and afterward Mohan leaves off. How long will Sohan take to complete the remaining work?

  1. A.

    20 days

  2. B.

    11 days

  3. C.

    14 days

  4. D.

    More than one of the above

  5. E.

    None of the above

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Show answer & explanation

Correct answer: B

Step 1: Mohan's work rate = 1/25 per day. Sohan's work rate = 1/20 per day.

Step 2: Combined work rate = 1/25 + 1/20 = (4 + 5)/100 = 9/100 per day.

Step 3: Work done in 5 days = 5 × 9/100 = 45/100 = 9/20.

Step 4: Remaining work = 1 - 9/20 = 11/20.

Step 5: Time for Sohan to complete remaining work = (11/20) / (1/20) = 11 days.

हिन्दी उत्तर:

चरण 1: मोहन की कार्य दर = 1/25 प्रति दिन। सोहन की कार्य दर = 1/20 प्रति दिन।

चरण 2: संयुक्त कार्य दर = 1/25 + 1/20 = (4 + 5)/100 = 9/100 प्रति दिन।

चरण 3: 5 दिनों में किया गया कार्य = 5 × 9/100 = 45/100 = 9/20।

चरण 4: शेष कार्य = 1 - 9/20 = 11/20।

चरण 5: शेष कार्य पूरा करने में सोहन को लगने वाला समय = (11/20) / (1/20) = 11 दिन।

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