A and B can complete work together in 5 days. If A works at twice his speed and B at half of his speed, this work can be finished in 4 days. How many days would it take for A alone to complete the job?

10 | ||

12 | ||

15 | ||

18 |

Carpenter A can make a chair in 6 hours, carpenter B in 7 hours and carpenter C in 8 hours. If each carpenter works for 8 hours per day, how many chairs will be made in 21 days?

61 | ||

67 | ||

73 | ||

79 |

If 15 pumps of equal capacity can fill a tank in 7 days, then how many extra pumps will be required to fill the tank in 5 days?

6 | ||

7 | ||

14 | ||

21 |

A conveyor belt delivers baggage at the rate of 3 tons in 5 minutes, and a second conveyor belt delivers baggage at the rate of 1 ton in 2 minutes. How much time will it take to get 33 tons of baggage delivered, using both the conveyor belts?

25 minutes and 30 seconds | ||

30 minutes | ||

35 minutes | ||

40 minutes and 45 seconds |

If a quantity of food serves 80 soldiers for 17 days, then how many soldiers will it serve for 16 days?

85 | ||

68 | ||

64 | ||

96 |

7 men and 3 women can do twice as much work as done by 3 men and 7 women in the same time. What is the ratio of work done by a man and a woman in unit time?

1:11 | ||

11:1 | ||

1:1 | ||

None of these |

X is 3 times as fast as Y and is able to complete the work in 40 days less than Y. Then the time in which they can complete the work together is.

15 days | ||

10 days | ||

7 1/2 days | ||

5 days |

A and B can complete a piece of work in 8 days, B and C can do it in 12 days, C and A can do it in 8 days. A, B and C together can complete it in.......

4 days | ||

5 days | ||

6 days | ||

7 days |

A can complete a work in ‘m’ days and B can complete it in ‘n’ days. How many days will it take to complete the work if both A and B work together?

(m+n) days | ||

(1/m)X(1/n) days | ||

(m+n)/mn | ||

Mn/(m+n) |

4 men and 5 women can do a piece of work in 10 days. 5 men and 4 women can do the same work in 8 days. 8 men and 8 women can do the work in.....

3 days | ||

4 days | ||

5 days | ||

6 days |