A) 3 : 4 |
B) 1 : 2 |
C) 5 : 6 |
D) 4:5 |
D) 4:5 |
Speed of truck = \( \Large \frac{640}{10} \)= 64 km/h
Speed of car = \( \Large \frac{640}{8} \) = 80 km/h
So, the required ratio = \( \Large \frac{64}{80}=\frac{4}{5} \)= 4:5