Question

6. Johanna rides her motor scooter 10 miles to get to work. She travels at a speed

of 20 miles per hour. She wants to get there faster so she drives 25 miles)
How much less time will it take her to get to work?
hour.
per

Answer 1

To find out how much less time it will take Johanna to get to work if she drives 25 miles per hour instead of 20 miles per hour, you can use the following formula:

time = distance / speed

First, find the time it takes Johanna to get to work at 20 miles per hour:

time = 10 miles / 20 mph = 0.5 hours

Then, find the time it takes Johanna to get to work at 25 miles per hour:

time = 10 miles / 25 mph = 0.4 hours

The difference in time between the two speeds is 0.4 hours - 0.5 hours = -0.1 hours. This means that it will take Johanna 0.1 hours less to get to work if she drives 25 miles per hour instead of 20 miles per hour.

Explanation:

Answer 2

• It takes her 6 min less.

------------------------------------------------

Time for Johanna to get to work:

• 10 miles / 20 mph =
• 0.5 hr =
• 30 min

Time with faster speed:

• 10 miles / 25 mph =
• 0.4 hr =
• 24 min

The difference is:

• 30 min - 24 min = 6 min