Question

If you are riding your skateboard from a friend’s house to your house (3.2 kilometers), how many minutes will you save if you go 16 mi/hr instead of 8 mi/hr?

Answer 1

Answer: 7.5 minutes

Step-by-step explanation:

Given:

distance = 3.2 kilometer = 2 miles (as 1.6 Kilometer = 1 mile)

speed 1 = 8 mile/hr

speed 2 = 16 mile / hr

To find: time difference between 2 speeds

CASE 1 : TIME = DISTANCE / SPEED = 2/8 hr= 1/4 hr = 1*60/4 min= 15 minutes

CASE 2: TIME = DISTANCE / SPEED = 2/16 hr= 1/8 hr = 1*60/8 min= 7.5 minutes

DIFFERENCE BETWEEN 2 SPEEDS:

CASE 1 - CASE 2 = 15 -7.5 MIN =7.5 MIN