A car is being driven at 20m/ s when the driver sees a child run into the road. The driver’s usual reaction time is 0.70s, but this is doubled because the driver is tired. Once the driver applies the brakes, the car is brought uniformly to rest in a further 3.3s. What is the total distance travelled by the car between when the driver first sees the child to when the car stops?

A 33 m

B 40 m

C 47 m

D 61 m

E 66 m

F 80 m

G 94 m

Hi everyone, the answer is E)

Here is my work what did i do wrong?

u = 20 m/s

v = 0 m/s

t = (0,7 * 2) + 3,3 = 4,7 seconds

s = 1/2(u+v)t = 47 m