Question

17. Marlene drove 540 miles to visit a friend. She drove 3 hours and stopped

for gas. She then drove 4 hours and stopped for lunch. How many
more hours did she drive if her average speed for the trip was 60 miles
per hour?

Answer 1

0.5 hours

Explanation:

60 mph for 7 hours = 60×7= 420 miles

540-420=120 miles left

60mph÷120miles= 0.5 hours