Q:

A) 9 | B) 9.6 |

C) 10 | D) 10.8 |

Answer: D) 10.8

Explanation:

Explanation:

Relative speed = (60 + 40) km/hr =[ 100 x ( 5 / 18 ) ]m/sec = ( 250 /9 ) m/sec.

Distance covered in crossing each other = (140 + 160) m = 300 m.

Required time = [ 300 x ( 9/250 ) ] sec = ( 54/ 5 )sec = 10.8 sec.

5
871

4
1154

Q:

A) 12 hours | B) 23 hours |

C) 17 hours | D) 18 hours |

5
1047

Q:

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

C) 5 hours | D) 4 hours |

2
911

1
799

3
921

Q:

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

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

4
801

2
848