7. | In 100 m race, A covers the distance in 36 seconds and B in 45 seconds. In this race A beats B by: | ||||||||||||||

A beats B by 20 metres. |

8. | In a game of 100 points, A can give B 20 points and C 28 points. Then, B can give C: | |||||||||||||||||||||||||||||||||

A : B = 100 : 80. A : C = 100 : 72.
B can give C 10 points. |

9. | In a 200 metres race A beats B by 35 m or 7 seconds. A’s time over the course is: | ||||||||||||||

B runs 35 m in 7 sec.
B’s time over the course = 40 sec. A’s time over the course (40 – 7) sec = 33 sec. |

10. | A can run 22.5 m while B runs 25 m. In a kilometre race B beats A by: | |||||||||||||||||||||||||

B beats A by 100 m. |