Q:

A) 27 7/9 mts | B) 25 8/7 mts |

C) 21 1/4 mts | D) 22 mts |

Answer & Explanation
Answer: A) 27 7/9 mts

Explanation:

Explanation:

Relative speed = (40 - 20) km/hr = | 20 x | 5 | m/sec = | 50 | m/sec. | ||||

18 | 9 |

Length of faster train = | 50 | x 5 | m = | 250 | m = 27 | 7 | m. | ||

9 | 9 | 9 |

1
20

Q:

A) 3.7 | B) 2.7 |

C) 3.6 | D) 2.9 |

Answer & Explanation
Answer: D) 2.9

Explanation:

Explanation:

*x*^{z} = *y*^{2} 10^{(0.48z)} = 10^{(2 x 0.70)} = 10^{1.40}

0.48*z* = 1.40

*z* = 140/18 = 35/12 = 2.9 (approx.)

2
14

Q:

A) 2.9 years | B) 3.5 years |

C) 4.2 years | D) 4.7 years |

Answer & Explanation
Answer: B) 3.5 years

Explanation:

Explanation:

Given that Rs. 1860 will become Rs. 2641.20 at 12%

=> Interest = 2641.20 - 1860 = Rs. 781.20

We know I = PTR/100

=> 781.20 x 100 = 1860 x T x 12

=> T = 78120/1860x12

=> T = 78120/22320

=> T = 3.5 years.

1
3

Q:

A) 60 lit | B) 55 lit |

C) 45 lit | D) 50 lit |

1
25

Q:

A) 6548 | B) 5667 |

C) 7556 | D) 8457 |

Answer & Explanation
Answer: C) 7556

Explanation:

Explanation:

Let ratio of the incomes of Pavan and Amar be 4x and 3x

and Ratio of their expenditures be 3y and 2y

4x - 3y = 1889 ......... I

and

3x - 2y = 1889 ...........II

I and II

y = 1889

and x = 1889

**Pavan's income = 7556**

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8