In a trip, Kiran travelled 50 miles per hour for 3 hours on bike. Further he travelled by car for 2 hours at 65 miles per hour. He stopped for 2 hours for rest. After rest he travelled on bike for 4 hours at 80 miles per hour to reach his destination. Find Kiran’s average speed for the entire journey. (in miles per hour) (Rounded off to two places of decimals)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 54.54
Average speed = Tota distance/Total time
Distance covered by Kiran on bike = 50 × 3 = 150 miles
Distance covered by Kiran by car = 65 × 2 = 130 miles
He stopped for 2 hours to rest
Distance covered by Kiran by car = 80 × 4 = 320 miles
Average speed = (150 + 130 + 320)/(3 + 2 + 2 + 4) = 600/11 = 54.54 miles/hour