OFB Labour Group-C Question Paper - 2014 with Answer Key

OFB Labour Group-C Question Paper - 2014 with Answer Key

76) On selling a calculator for Rs. 371, a man gains 6%. For how much should he sell it to gain 8%?

Answer is:

Rs. 378

77) A and B can do a piece of work in twenty days. but A alone can do it in Thirty days. how long will B take to do it alone?

Answer is:

60 days

Explanation:

A and B together can do a piece of work in 20 days

Part of work A and B can do in 1 day = 1/20

A alone can do the work in 30 days

Part of work A can do in 1 day = 1/30

∴ Part of work B alone can do in a day = 1/20 - 1/30 = 1/60

∴ B alone can do the work in 60 days

78) A tractor ploughs a field in fifteen days. Another tractor ploughs it is twenty days. In how many days could they plough the field together?

Answer is:

60/7 days

79) How many minutes would it take a policeman to overtake a motorist travelling at the rate of 60 km/hr. If the policeman is at a distance of one - quarter of a kilometer behind the motorist and the policeman is maintaining a speed of 65 km/hr.?

Answer is:

80) In addition and subtraction of two integers, sign of the answer depends upon

Answer is:

Greater numerical value