Question

20 POINTS

A Walmart truck driver estimates that it will take him 12 hours to drive 1158 km. After 5 hours, he has drive 484 km.

(a) According to his estimate, how long would it take him to drive 1 hour? Show your number sentence and solution.

(b)Is he on schedule to arrive on time? Explain your reasoning.

Type your answer below:

Answer 1

Ans(a):

Given that total distance = 1158 km

Estimated time of drive = 12

now question says to distance that can be driven in 1 hour.

Indirectly it is asking for his speed.

So we can use formula of speed

`Speed = (distance)/(time)=(1158)/(12)=96.5` km per hour.

Hence he will drive approx 96.5 km in 1 hour.

Ans(b):

Actual driven distance = 484 km

Actual time taken = 5 hours

Then actual speed
`= (484)/(5)= 96.8` km per hour

Comparing speeds in both parts, we see that actual speed 96.8 km/hour is more than the expected speed 96.5 km/hour.

Hence he will reach at his destination on schedule or before the expected time.