Since the angle about the centre of circle is 360∘, divide 360∘ in proportion of given data.
Divide 360∘ in proportion 10 : 40 : 60 : 80 to obtain the corresponding central angle.
Make a table as given below.
Name of objectSpeed in km/hrCentral angleBicycle1010240×360∘=15∘Scooter4040240×360∘=60∘Car6060240×360∘=90∘Bus5050240×360∘=75∘Train8080240×360∘=120∘240360∘