Question

21) On the first day of his cross-country trip, Mike drove 100 miles in 2 hours before stopping for lunch. After lunch, he drove 420 miles in 6 hours. What was average speed in miles per hour for his 8 hours of driving

Answer 1

65 mph.

Explanation:

Average speed = total distance travelled / total time taken

= (100 + 420) / 8

= 520 / 8

= 65 mph (answer).