A car travels with a constant velocity of 45 kmh-1 for 20s. What distance does it cover in this time?
A
0.025m
B
0.250m
C
2.500m
D
25.000m
E
250.000m
Verified Correct Answer: E.
Physical Principles & Numerical Solution
Convert the speed from kilometers per hour (\(\text{km/h}\)) to meters per second (\(\text{m/s}\)) by multiplying by 45 x \(\frac{1000}{3600}\) = 12.5m/s
But distance = velocity x time = 12.5 x 20 = 250m.
Source: Myschool Past Questions Archive (Record #42984)