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RRB NTPC Time and Work — practice questions — page 3

Explore 78 free Time and Work questions in RRB NTPC Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Time and Work questions and exercises with answers

Showing questions 61–78 of 78.

A is paid Rs 500 a day for 6 days and B Rs 300 a day for 10 days. Together they are paidRead the answer and worked solution →Six men earn Rs 4800 in 8 days. At the same rate, 10 men working 12 days earnRead the answer and worked solution →Two taps fill a bath in 8 and 24 minutes. Together they fill it inRead the answer and worked solution →Pipe P is three times as fast as pipe Q, and both fill a tank in 12 minutes. Q alone needsRead the answer and worked solution →A pipe fills two thirds of a tank in 8 hours. The full tank needsRead the answer and worked solution →A tank is one quarter full. A pipe fills a whole tank in 12 hours. The rest fills inRead the answer and worked solution →Pipes fill a tank in 12 and 18 minutes. Both run for 6 minutes. The fraction filled isRead the answer and worked solution →A and B take 10 days, B and C take 15 days, A and C take 12 days. All three together takeRead the answer and worked solution →A job takes 24 days at 5 hours a day. Working 6 hours a day, it takesRead the answer and worked solution →Ten men working 8 hours a day build a wall in 18 days. Twelve men at 6 hours a day needRead the answer and worked solution →A pipe alone fills a tank in 15 minutes; with a second pipe it takes 6 minutes. The second pipe alone takesRead the answer and worked solution →Sita does a job in 30 days. Sita and Tara together do it in 20 days. Tara alone needsRead the answer and worked solution →A alone does a job in 9 days and B alone in 18 days. They earn Rs 900 together. A's share isRead the answer and worked solution →A does a job in 16 days, B in 8 days. A works 4 days alone, then B joins. Total time from start isRead the answer and worked solution →A takes 12 days and B takes 24 days. A leaves 3 days before the work ends. Total time wasRead the answer and worked solution →If a task requires 20 man-hours, how many hours will a team of 2 workers take?Read the answer and worked solution →How is task time found from man-hours and worker count?Read the answer and worked solution →What labor metric denotes the amount of work done by an average worker in a day?Read the answer and worked solution →

Worked practice questions

A is paid Rs 500 a day for 6 days and B Rs 300 a day for 10 days. Together they are paid

  1. Rs 5000
  2. Rs 6000
  3. Rs 5500
  4. Rs 6500
Show answer and solution

Correct answer: B. Rs 6000

A earns 500 x 6 = 3000 and B earns 300 x 10 = 3000, total Rs 6000.

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Six men earn Rs 4800 in 8 days. At the same rate, 10 men working 12 days earn

  1. Rs 15000
  2. Rs 10000
  3. Rs 9000
  4. Rs 12000
Show answer and solution

Correct answer: D. Rs 12000

One man-day pays 4800/48 = Rs 100, and 120 man-days pay Rs 12000.

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Two taps fill a bath in 8 and 24 minutes. Together they fill it in

  1. 6 minutes
  2. 8 minutes
  3. 16 minutes
  4. 5 minutes
Show answer and solution

Correct answer: A. 6 minutes

Rates add to 1/8 + 1/24 = 4/24 = 1/6, so 6 minutes.

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