Time and Work - Mock Test 7

Question 61

A boat takes half time in moving a certain distance downstream than upstream. What is the ratio between the rate in still water and rate of current?

A) 1 : 2 B) 3 : 1 C) 2 : 1 D) 1 : 3

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Question 62

A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will he take to go 5km in stationery water?

A) 40 Minutes B) 1 Hour C) 1 hr 15 Min D) 1 Hr 30 Min

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Question 63

A man can row 7 ½ kms on hour in still water and he finds that it takes hi twice as long to row down the river. The rate of stream is?

A) 2.4km/hr B) 2.5 km/hr C) 3.4km/hr D) 3.5km/hr

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Question 64

A man can row three-quarters of a kilometer against the stream in 11 ¼ minutes and return in 7 ½ minutes. The speed of the man in still water is?

A) 2km/hr B) 3km/hr C) 4 km/hr D) 5 km/hr

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Question 65

A boat goes 6 km in an hour in still water. It takes thrice as much time in covering the same distance against the current. Speed of the current is?

A) 2 km/hr B) 3km/hr C) 4km/hr D) 5 km/hr

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Question 66

A boat running upstream takes 8 hours 48 min to cover a certain distance while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and the speed of water current respectively?

A) 2 : 1 B) 3 : 1 C) 8 : 3 D) Cannot be determined

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Question 67

In a river, a man takes 3 hours in rowing 3 km upstream or 15 km downstream. What is the speed of the current?

A) 2km/hr B) 4km/hr C) 6km/hr D) 9km/hr

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Question 68

A man can row at 5 km/hr in still water, if the river is running at 1 km/hr it takes him 75 minutes to row to a place and back. How far is the place?

A) 2.5km B) 3km C) 4 km D) 5 km

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Question 69

he speed of a motor boat is that of the current of water as 36:5. The boat goes along with the current in 5 hours 10 min, it will come back in?

A) 5hrs 50 min B) 6 hours C) 6 hours 50 min D) 12 hours 10 min

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Question 70

The speed of a boat in still water is 5 km/hr, it can go 30km upstream and return downstream to the original point in 4 hours 30 min. The speed of the stream is?

A) 5km/hr B) 8 km/hr C) 10 km/hr D) 15 km/hr

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