571 .
A boy runs 200 metres in 24 seconds. What is his speed ?

A. | 10 km/hr | B. | 20 km/hr |

C. | 30 km/hr | D. | 40 km/hr |

572 .
If the speed of a man is 45 km per hour, then what is the distance traveled by him in 30 seconds ?

A. | 190 m | B. | 260 m |

C. | 330 m | D. | 375 m |

573 .
An escalator moves towards the top level at the rate of 11 ft.sec and its length is 140 feet. If a person walks on the moving escalator at the rate of 3 feet per second towards the top level, how much

A. | 7 sec | B. | 10 sec |

C. | 13 sec | D. | 19 sec |

574 .
In a 1000 m race Usha beats Shiny by 50 m. In the same race, by what time margin Shiny beat Mercy who runs at 4 m/s ?

A. | 50 sec | B. | 40 sec |

C. | 30 sec | D. | 20 sec |

575 .
A train 575 m long crosses a tunnel of length 325 in 90 sec. What is the speed of the train in kmph.

A. | 18 kmph | B. | 36 kmph |

C. | 52 kmph | D. | 72 kmph |

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