Correct Answer - Option 4 : None of these
Given∶
He drove 10 miles in 2 hours
Also, he arrived half an hour late
Formula Used∶
Speed = Distance / Time
Calculation∶
According to question,
Time taken to reach stadium = 2 + 1 / 2 = (4 + 1) / 2 = 5 / 2 hr.
Required Speed = Distance/Time
⇒ 10 / (5 / 2)
⇒ (10 × 2) / 5
⇒ 4 miles
∴ He should drive with a speed of 4 miles/hour to reach exactly on time.