Mohan takes 6 hours to do a job and Laltu takes 10 hours to do the same job. How long will it take if Mohan and Laltu work together on the same job? - General Intelligence & Reasoning MCQ Competitive Exam 2026 | ExamTest.live

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Mohan takes 6 hours to do a job and Laltu takes 10 hours to do the same job. How long will it take if Mohan and Laltu work together on the same job?

Solution & Step-by-step Explanation

1. Mohan's work rate = \frac{1}{6} of the job per hour. 2. Laltu's work rate = \frac{1}{10} of the job per hour. Combined work rate when working together: Rate = \frac{1}{6} + \frac{1}{10} = \frac{5 + 3}{30} = \frac{8}{30} = \frac{4}{15} of the job per hour Time taken to complete the job together: Time = \frac{1}{Rate} = \frac{15}{4} hours = 3 \frac{3}{4} hours

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Mohan takes 6 hours to do a job and Laltu takes 10 hours to do the same job. How long will it take if Mohan and Laltu work together on the same job?

1 \frac{1}{2} hours

3 \frac{3}{4} hours

2 \frac{1}{3} hours

3 \frac{1}{4} hours

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