Sam took 40 minutes to complete a journey at an average speed of 84 km/h whereas Jack took 25 minutes. What was Jack’s speed?
Question
Sam took 40 minutes to complete a journey at an average speed of 84 km/h whereas Jack took 25 minutes. What was Jack’s speed?
Solution
Step 1: Convert the time from minutes to hours.
For Sam: 40 minutes = 40/60 = 0.67 hours For Jack: 25 minutes = 25/60 = 0.42 hours
Step 2: Calculate the distance travelled by Sam using the formula: Distance = Speed x Time
For Sam: Distance = 84 km/h x 0.67 hours = 56.28 km
Step 3: Assume that Jack travelled the same distance as Sam. So, we can calculate Jack's speed using the formula: Speed = Distance / Time
For Jack: Speed = 56.28 km / 0.42 hours = 134 km/h
So, Jack's speed was 134 km/h.
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