Ratio and Proportion Practice Test 3

Question : 14 of 40

Marks: +1, -0

The ratio between the speed of a truck, car and train is 3 : 8 : 12 respectively. The car is uniformly moving and covered a distance of 1,040 km in 13 hrs. What is the average speed of the truck and the train together?

75 km/hr
60 km/hr
48 km/hr
None of these
Cannot be determined

Validate

Solution:

Distance covered by the car is 1,040 km in 3 hours.
So, speed of car =

1010/13

= 80 km
Let the speed of car be 8x = 80
x = 10
Speed of truck and train be 3x and 12x.
Speed of truck = 3 × 10 = 30 km
Speed of train = 12 × 10 = 120 km
Total speed of truck and train = 150 km
Average speed of truck and train =

150/2

= 75 km/hr

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