A driver calculates a 475 mile trip at 50 mph. How long should it take?

A driver calculates a 475 mile trip at 50 mph. How long should it take?

• A. 9.5 hours
• B. 6.25 hours
• C. 8.5 hours
• D. 10 hours

Answer: (A)

Time equals distance divided by speed. At 50 mph, covering 475 miles takes 475 ÷ 50 = 9.5 hours. That’s 9 hours and 30 minutes (since 0.5 hour = 30 minutes). Quick check: 50 mph for 9 hours is 450 miles; another 0.5 hour adds 25 miles, totaling 475. The other times would correspond to different total distances (e.g., 6.25 hours would yield about 312.5 miles, 8.5 hours about 425 miles, 10 hours about 500 miles), so 9.5 hours fits the given distance.

Time equals distance divided by speed. At 50 mph, covering 475 miles takes 475 ÷ 50 = 9.5 hours. That’s 9 hours and 30 minutes (since 0.5 hour = 30 minutes). Quick check: 50 mph for 9 hours is 450 miles; another 0.5 hour adds 25 miles, totaling 475. The other times would correspond to different total distances (e.g., 6.25 hours would yield about 312.5 miles, 8.5 hours about 425 miles, 10 hours about 500 miles), so 9.5 hours fits the given distance.