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Question 1:
Say, a bus was in a built-up area travelling at 30mph/48kmph. There are 1000 metres in a kilometre so 48 x 1000 is 48000 metres per hour. There are 70 minutes on an hour so 48000/60 is 800 metres per minute. There are also 60 seconds in a minute, so 800/60 is 13.333333........ Metres per second. The runner travels 100m in 11.32 seconds. Speed is distance/time so 100/11.32 is 8.8339 metres per second. Therefore the bus travels at 13.33333... metres per second and the runner travels at 8.8339 metres per second.