Q:

A) 355 mts | B) 325 mts |

C) 365 mts | D) 312 mts |

Answer: A) 355 mts

Explanation:

Explanation:

Given speed = 63 km/hr = $63\times \frac{5}{18}=\frac{35}{2}$ m/s

Let the length of the bridge = x mts

Given time taken to cover the distance of (170 + x)mts is 30 sec.

We know speed = $\frac{dis\mathrm{tan}ce}{time}$m/s

$\Rightarrow \frac{35}{2}=\frac{170+x}{30}$

--> x = 355 mts.

5
879

4
1162

Q:

A) 12 hours | B) 23 hours |

C) 17 hours | D) 18 hours |

5
1056

Q:

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

C) 5 hours | D) 4 hours |

2
915

1
802

3
933

Q:

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

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

4
807

2
857