Question

in 2.5 hours, Mr. Castelli drives a distance of 125 miles. He wants to know his average driving speed in the meters per minute. Complete the table to find Mr. Castelli’s average driving speed in meters per minute by using the units as a guide.

Answer 1

1,350 meters per min

Explanation:

Given that Mr. Castelli covers 125 miles in 2.5 hours, the average speed =
`(distance)/(time)`.

In miles per hr, average speed =
`(125)/(2.5) = 50 miles/hr`.

Converting 50 miles/hr to km per hr:

If 1 miles = 1.62 km (unit conversion)

50 miles = 50*1.62 = 81 km/hr

Converting 81 km/hr to meters per hr:

1 km = 1,000 m (unit conversion)

81 km = 81*1,000 = 81,000 m/hr

Converting 81,000 m/hr to meters per minutes:

60 mins = 1 hr

Therefore, average speed =
`(81,000)/(60) = 1,350 meters/min`

Average driving speed of Mr Castelli in meters per minute = 1,350 meters per minute.