Officer (Freedom Fighter) 2019[MCQ]

51. A man rows a certain distance along the stream and against the stream in 1 hour and 1.5 hours respectively. If the velocity of the current is 3 km/hr, what is the speed of a man in still water?

[Officer (Freedom Fighter) 2019[MCQ] : 2019]

1. 12 km/hr

2. 13 km/hr

3. 11 km/hr

4. 15 km/hr

Answer

52. A milkman pays Tk. 6.40 per liter of milk. He adds water and sells the mixture at Tk. 8 per liter. By doing this, he makes 37.5% profit. Find the proportion of water to milk received by the customers?

[Officer (Freedom Fighter) 2019[MCQ] : 2019]

1. 1:12

2. 1:10

3. 1:15

4. 1:20

Answer

53. A leading library charges c cents for the first week that a book is loaned and f cents for each day over one week. What is the cost for taking out a book for d days, where d is greater than 7 ?

[Officer (Freedom Fighter) 2019[MCQ] : 2019]

1. c+fd

2. cd

3. c+ f(d -7)

4. cd + f

Answer

54. Find the compound interest at the rate of 10% per annum for four years on the principal which in four years at the rate of 4% per annuin gives Tk. 1600 as simple interest.

[Officer (Freedom Fighter) 2019[MCQ] : 2019]

1. Tk. 4641

2. Tk. 4732

3. Tk. 4321

4. Tk. 4899

Answer

55. A wheel rotates 10 times per minutes and moves 20m during each rotation. How many feet does the wheel move in 1 hour?

[Officer (Freedom Fighter) 2019[MCQ] : 2019]

1. 10000

2. 20000

3. 18000

4. 12000

Answer

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