8th Class Mathematics Work and Time Question Bank

done Self Test-9

• question_answer1) Morish has to go to the certain place at a certain fixed time and finds that he will be late if he walks at the usual speed as he is walking. On the other hand if he walks at the speed of 10 km/h then he will be late by 5 minutes and if he walks at the speed of 18 km/h then he reaches the place by 10 minutes early. The distance he has to walk is:

  A) 1.6km done clear

  B) 20km done clear

  C) 15km done clear

  D) 5km done clear

  E) None of these done clear

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• question_answer2) If 40 men can complete a work in 10 days working 10 hours a day, then find the number of men is required to finish the work in 5 days if they work 10 hours in a day.

  A) 100 men done clear

  B) 60 men done clear

  C) 150 men done clear

  D) 80 men done clear

  E) None of these done clear

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• question_answer3) The distance between the two stars x and y is one hundred forty three million four hundred thousand kilometers. The light takes 8 minutes and 58 seconds to travel from to y. The velocity of the light is:

  A) done clear

  B) done clear

  C) done clear

  D) done clear

  E) None of these done clear

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• question_answer4) Three friends Smith, Jack and Pamila are walking at the speed of 3, 4, 5 km/h respectively. They start at same place at 1, 2, 3 O'clock respectively. When Jack reaches Smith, he sends him back with a message for Pamila. At what time will Pamila get the message?

  A) 5:15 0' Clock done clear

  B) 5:30 0' Clock done clear

  C) 5:45 0' Clock done clear

  D) 6:00 0' Clock done clear

  E) None of these done clear

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• question_answer5) A contractor takes up the work of painting the wall of the house and employs two workers for the work. The first worker can finish the work in 36 days and second worker can do the same work in half the time taken by the first worker. If they take up the work together then in how much days can they finish the part of work in one day?

  A) done clear

  B) done clear

  C) done clear

  D) done clear

  E) None of these done clear

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• question_answer6) The inspector spotted the terrorist at a distance of 800 meters and started chasing him. The speed of the terrorist is 30 m/sec and that of the inspector is 40 m/sec. How far the terrorist will run before the inspector will catch him.

  A) 1km done clear

  B) 2.4km done clear

  C) 1.5km done clear

  D) 1.8km done clear

  E) None of these done clear

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• question_answer7) Two workers Prince and Astel work as gardener. Prince can do the cleaning work of garden in 12 days while Astel is 60% more efficient than Prince. In how many days can Astel alone complete the cleaning work of the garden?

  A) days done clear

  B) days done clear

  C) days done clear

  D) days done clear

  E) None of these done clear

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• question_answer8) A train running at the speed of 80 km/h passes a horse running in opposite direction at the speed of 20 km/h and passes it in 10 seconds. The length of the train is :

  A) 277m done clear

  B) 277.8m done clear

  C) 279m done clear

  D) 280m done clear

  E) None of these done clear

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• question_answer9) Two pipes can fill a cistern in 12 hours and 15 hours respectively. Due to leakage in the bottom, 30 minutes extra are taken for the cistern to be filled up if both the pipes are open together. If the cistern is full, how much time will the leak take to empty the tank?

  A) 97.5 hours done clear

  B) 95.5 hours done clear

  C) 93.5 hours done clear

  D) 91.5 hours done clear

  E) None of these done clear

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• question_answer10) A man has to cross the river. He asks the boat man to take him across the river. The boat can row the downstream in 8 hours and return the same distance in 12 hours. If the stream flows at the rate of 2.25 km/h. The distance the boat can row in one hour in still water is:

  A) 11.25km done clear

  B) 15.5km done clear

  C) 18.2km done clear

  D) 8.5km done clear

  E) None of these done clear

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