# physical science

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A horse galloped a mile in 2 min 35s. What was its average speed in km/h?

• physical science -

change time to seconds. Then seconds to hours.

change mile to km.

avgspeed=distance/time=1mile/(2min35sec) or
= 1mile/(2min+35sec)*1min/60sec=
=1mile/(2*60+35)sec*3600sec/hr

=1mile*1.609 Km/mile

= 1.609km/155sec*3600sec/hr

• physical science -

37.37

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