Question

Mr. Martin traveled to a city 310 miles from his home to attend a meeting. Due to car trouble, his average speed returning was 7 mph less than his speed going. If the

total time for the round trip was 12 hours, at what rate of speed did he travel to the city? (Round your answer to the nearest tenth.)

Answer 1

Step-by-step:

ANALYSIS:

From the question, we know that...

• 310m from his home to the meeting

• Average speed RETURNING: 7 mph LESS than the speed he went on

• Total time = 12 hours

• Rate of speed = ?

-Round off to the nearest TENTH-

Step-by-step explanation:

Speed = Distance / Time

• S = 310/12

• S = 25.83333... mph

• S = 25.83 (round off)

Then it says that speed returning is -7 from the speed he went on, so...

• 25.83 - 7 = 18.83 mph

Rounding off to the nearest TENTH:

18.83 = 18.8 mph

Final Answer : 18.8 mph