SSC CGL · Quantitative Aptitude

Arithmetic: Time, Work and Speed

11 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 11 questions

  1. A can complete a job in 12 days and B in 6 days. Working together, in how many days will they complete it?
  2. A train 180 m long runs at 54 km/h. How many seconds does it take to cross a pole?
  3. Pipe A fills a tank in 12 hours and pipe B in 6 hours. If both are opened together, how long do they take to fill the empty tank?
  4. A person covers 120 km at 40 km/h and returns the same 120 km at 60 km/h. What is the average speed for the whole journey?
  5. A can complete a job in 15 days and B in 10 days. Working together, in how many days will they complete it?
  6. A can complete a job in 6 days and B in 12 days. Working together, in how many days will they complete it?
  7. A train 300 m long runs at 36 km/h. How many seconds does it take to cross a pole?
  8. A boat's speed in still water is 9 km/h and the stream flows at 3 km/h. How long does it take to go 30 km downstream and return?
  9. A boat's speed in still water is 10 km/h and the stream flows at 2 km/h. How long does it take to go 36 km downstream and return?
  10. A person covers 100 km at 50 km/h and returns the same 100 km at 25 km/h. What is the average speed for the whole journey?
  11. A boat's speed in still water is 10 km/h and the stream flows at 2 km/h. How long does it take to go 24 km downstream and return?

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