We have to determine first the distance. Given the speed of 40 miles/hour and time of 4 hours, distance can be solved from the formula, speed = distance / time. Let’s evaluate:
Distance = speed x time
Distance = 40 x 4 = 160 miles.
At same distance, we have to determine time it will take at the speed of 40 miles/hour. Therefore we have:
speed = distance / time
time = distance / speed
time = 160 / 55 = 2.91 hours
You are correct, the answer is A
