Talking about SPEED

Do you know... that different countries use different "units" to describe speed?

Mr Yeo recorded (in his device) his cycling speed as 24 mph (miles per hour), which is definitely different from 24 km/h (kilometres per hour, which is more commonly used in Singapore) From the image,
(1) Are you able to tell how fast did Mr Yeo cycle in terms of km/h?
(2) Would you have enough info to derive a figure that helps us to do the conversion from mph to km/h very quickly?

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