A car travels 40 km at an average speed of 80 km/h and then travels 40 km at an average speed of 40 km/h. The average speed of the car for this 80 km trip is |
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(a) |
40 km/h |
(b) |
45 km/h |
(c) |
48 km/h |
(d) |
53 km/h |

A car travels 40 km at an average speed of 80 km/h and then travels 40 km at an average speed of 40 km/h. The average speed of the car for this 80 km trip is |
|||||||

(a) |
40 km/h |
(b) |
45 km/h |
(c) |
48 km/h |
(d) |
53 km/h |

A man walks along the footpath of a circular garden. During his motion along the circular path he makes several rounds. His net displacement will be zero whenever his distance travelled will be in multiples of |
|||

(a) |
its radius |
(b) |
its diameter |

(c) |
circumference of circular path |
(d) |
area of circle |

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