Ravi drove for 4 hours at a speed of 70 miles per hour and for 2 hours at 40 miles per hour. What was his average speed (in miles per hour) for the whole journey ?
Answer & explanation
Correct answer: option 2
We know ,
Distance = Speed × Time
D1= 4 × 70 = 280 miles
D2 = 2 × 40 = 80 miles
Total distance = 280 + 80 = 360 miles
Total Time = 4 + 2 = 6 hours
Average Speed = \(\frac{360}{6}\)
= 60 miles/hour