Q:

A) 60 sec | B) 48 sec |

C) 45 sec | D) 34 sec |

Answer: B) 48 sec

Explanation:

Explanation:

Relative speed = 42 + 36 = 78 km/hr = $\frac{65}{3}$ m/s

Distance = (520 + 520) =1040 mts.

Time = $1040\times \frac{3}{65}$= 48 sec

2
163

1
577

Q:

A) 12 hours | B) 23 hours |

C) 17 hours | D) 18 hours |

3
554

Q:

A) 4 hours 20 min | B) 5 hours 20 min |

C) 5 hours | D) 4 hours |

2
520

1
481

3
585

Q:

A) 120 km/h | B) 125 km/h |

C) 115 km/h | D) 110 km/h |

4
475

1
529