Question

15 Paul swims 750 metres in 25 minutes. What is his average speed in km/h? ​

Answer 1

1.8

Explanation:

speed = distance/time

Distance measured in km

Time measures in hours

750m = 0.75

25mins = 0.42 of an hour

0.75/0.42 = 1.8 to 1dp

Answer 2

• 1.8 km/h

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We know that:

• 1 m = 1/1000 km,
• 1 min = 1/60 h,
• speed = distance / time

Find the speed and convert as below:

• 750 m / 25 min =
• 30 m/min =
• 30 × (1/1000) km / (1/60) h =
• (3/100) × 60 km/h =
• 18/10 km/h =
• 1.8 km/h