A) 42 kmph | B) 72 kmph |

C) 36 kmph | D) 44 kmph |

Explanation:

Given speed of the first train = 60 km/hr = 60 x 5/18 = 50/3 m/s

Let the speed of the second train = x m/s

Then, **the difference in the speed** is given by

$\frac{\mathbf{50}}{\mathbf{3}}\mathbf{}\mathbf{-}\mathbf{}\mathbf{x}\mathbf{}\mathbf{=}\mathbf{}\frac{\mathbf{120}}{\mathbf{18}}$

=> x = 10 m/s

=> 10 x 18/5 = **36 km/hr**

A) 72 | B) 84 |

C) 93 | D) 81 |

Explanation:

Ratio of girls and boys = **100% : 75% = 4:3**

Difference is 1 unit = 35

So, 3 units = 35 x 3 = 105

If 20% absent, that’s mean 80% present.

So, present boys = 80% of 105 = $\frac{\mathbf{80}\mathbf{\times}\mathbf{105}}{\mathbf{100}}\mathbf{}\mathbf{=}\mathbf{}\mathbf{84}$

A) 31 | B) 33 |

C) 29 | D) 27 |

Explanation:

Let the three consecutive odd numbers be **x, x+2, x+4**

**Then,**

**x + x + 2 + x + 4 = 93**

**=> **3x + 6 = 93

=> 3x = 87

=> x = 29 => **29, 31, 33 are three consecutive odd numbers.**

Therefore, the middle number is **31.**

A) ClCH2COOH | B) BrCH2COOH |

C) FCH2COOH | D) ICH2COOH |

Explanation:

**FCH _{2}COOH** is the strongest acid out of all .Since the electron withdrawing inductive effect (-I effect) of the halogens decreases in the order

F>Cl> Br> I , therefore the acidic strength of the α- halo acids decreases in the same order.

**FCH _{2}COOH > ClCH_{2}COOH > BrCH_{2}COOH > ICH_{2}COOH.**

A) 8640 | B) 720 |

C) 3620 | D) 4512 |

Explanation:

Let the 6 digits of the required 6 digit number be **abcdef**

Then, the number to be odd number the last digit must be odd digit i.e **3, 5, 7 or 9**

The first digit cannot be** ‘0’ **=> possible digits** = 3, 5, 7, 2, 6, 8**

Remaining 4 places can be of **6 x 5 x 4 x 3** ways

This can be easily understood by

Therefore, required number of ways = 6 x 6 x 5 x 4 x 3 x 4 = 36 x 20 x 12 = 720 x 12

= **8640 ways.**

A) India and Tibet | B) Pakistan and Bangladesh |

C) India and Bangladesh | D) India and Pakistan |

Explanation:

The partition of the Indian subcontinent into **India and Pakistan** after World War-II along the ''Radcliffe line'' following the Indian Independence Act of 1947 was based on religion conflicts.

Pakistan was a Muslim-majority country, while India's population consisted mostly of Hindus. Originally, Pakistan was divided into two regions, East Pakistan and West Pakistan. However, East Pakistan won its independence in 1971, and is now called **Bangladesh.**

A) Audio | B) Movies or other Videos |

C) Images | D) Documents |

Explanation:

A .**MOV** file is a common multimedia container file format developed by Apple. It may contain multiple tracks that store different types of media data and is often used for saving movies and other video files.