| A truck covers a distance of 640 km in 10 h. A car covers the same distance in 8 h. What is the respective ratio between the speed of the truck and the car? |
A) 3 : 4
B) 1 : 2
C) 5 : 6
D) 6 : 7
E) None of these
Correct Answer: E
Solution :
| \[\because \] Distance covered by truck = 640 km |
| and time taken = 10 h |
| \[\therefore \] Speed of truck \[=\frac{640}{10}=64\,km/h\] |
| Distance travelled by car = 640 km |
| and time taken = 8 h |
| \[\therefore \] Speed of car \[=\frac{640}{8}=80\,km/h\] |
| Hence, required ratio = 64: 80 = 4: 5 |
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