12
Q:

The ratio of the speeds of a car, a jeeps and a tractor is 3 : 5 : 2. The speed of the jeep is 250 per cent of the speed of the tractor and tractor covers 360 km in 12 hours. What is the average speed of car and jeep together?

A) 50 kmph B) 60 kmph
C) 70 kmph D) 80 kmph

Answer:   B) 60 kmph



Explanation:

Speed of tractor = 360/12 = 30 kmph

Speed of jeep = 250 x 30/100 = 75 kmph

But, given ratio of speed of car, jeep and tractor is 3 : 5 : 2

Speed of car = 3 x 75/5 = 45 kmph

 

Required, average speed of car and jeep = 75 + 45/2 = 60 kmph.

Q:

A car covers 25 km at a uniform speed. If the speed had been 8 knv/h more, it would have taken 10 hours less for the same journey. What is the speed of the car (in km/h)?

 

A) 4 B) 3
C) 2.5 D) 2
 
Answer & Explanation Answer: D) 2

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1 96
Q:

The ratio between the speeds of two trains is 5 : 7. If the first train covers 300 km in 3 hours, then the speed (in km/h) of the second train is:

 

A) 100 B) 150
C) 140 D) 120
 
Answer & Explanation Answer: C) 140

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0 152
Q:

The ratio between the speeds of two trains is 2 : 5. If the first train runs 350 km in 5 h, then the difference between the speeds (in km/h) of both the trains is:

 

A) 350 B) 105
C) 165 D) 180
 
Answer & Explanation Answer: B) 105

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2 399
Q:

Given that the lengths of the paths of a ball thrown with different speeds by two boy sare the same, if they take 0.6 seconds and 1 second respectively to cover the said length, what is the average speed of travel for the first throw, if the same for the second is 96 km/h?

A) 160 km/h B) 200 km/h
C) 150 km/h D) 100 km/h
 
Answer & Explanation Answer: A) 160 km/h

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1 413
Q:

A man divided his journey into three parts of distances of 18 km, 20 km and 27 km. He travelled the distances at the speeds of 6 km/h, 5 km/h and 9 kn/h,respectively. What was his average speed during the entire journey?

 

A) 6.5 km/h B) 4.5 km/h
C) 7.5 km/h D) 5.5 km/h
 
Answer & Explanation Answer: A) 6.5 km/h

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2 653
Q:

The distance between two railway stations is 1176 km. To cover this distance, an express train takes 5 hours less than a passenger train while the average speed of the passenger train is 70 km/h less than that of the express train. The time taken by the passenger train to complete the travel is:

 

A) 12 hours B) 23 hours
C) 17 hours D) 18 hours
 
Answer & Explanation Answer: A) 12 hours

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2 753
Q:

The distance between the places H and O is D units. The average speed that gets a person from H to O in a stipulated time is S units. He takes 20 minutes more time than usual if he travels at 60 km/h, and reaches 44 minutes early if he travels at 75 km/h. The sum of the numerical values of D and S is:

 

A) 376 B) 358
C) 344 D) 384
 
Answer & Explanation Answer: D) 384

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0 488
Q:

A train that is running at the speed of 72 km/h crossesan electric pole in 36 seconds. The length of the train (in metres) is:

 

A) 720 m B) 460 m
C) 360 m D) 620 m
 
Answer & Explanation Answer: A) 720 m

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1 525