Important for :

1

B

Amount goes to charity = | 5 | × 75000 = Rs. 3750 |

100 |

Amount goes to Ram as a working partner

= | 10 | × 75000 = Rs. 7500 |

100 |

Remaining amount = Rs. (75000 – 3750 – 7500) = Rs. 63750

Share of Ram in the remaining profit = | 2 | × 63750 = Rs. 25500 |

5 |

Total share of Ram = Rs. (7500 + 25500) = Rs. 33000

Hence, option B is correct.

2

3

A

Let the speed of boy in still water be X km/hAnd the speed of current is given = 5 km/h

Downstream speed = (X + 5) km/h

Upstream speed = (X – 5) km/h

Let time be ‘t’ hours.

⇒ | (X + 5) t | = (X – 5) t |

3 |

⇒ X + 5 = 3X – 15

⇒ 2X = 20

⇒ X = 10 km/h

Downstream speed = 10 + 5 = 15 km/h

Upstream speed = 10 – 5 = 5 km/h

Hence, option A is correct.

4

D

Given :Chatur complete | ( | 3 | ) |
^{th} |
of assignment in 72 days |

5 |

Therefore,

Chatur could complete the whole assignment in

72 × 5 | = 120 days |

3 |

Now,

(Ankur + Bhanu + Chatur) worked for 6 days.

So,

Parts of assignment completed in first six days = | 6 |

20 |

Now, according to the question

(Bhanu + Chatur) worked for 4 days

So,

Parts of assignment completed in these four days

= 1 – | ( | 3 | + | 6 | ) | = 1 – | 9 | = | 1 |

5 | 20 | 10 | 10 |

Therefore,

(Bhanu + Chatur) could complete the whole assignment in (10 × 4) = 40 days

Let Bhanu could complete the whole assignment working alone in x days. Therefore,

Let Bhanu could complete the whole assignment working alone in x days. Therefore,

1 | + | 1 | = | 1 |

x | 120 | 40 |

40 (120 + x) = 120x

120x – 40x = 4800

x = 60

Hence, this is the required solution.

Therefore, option D is correct.

5

B

Let Rajeev’s present age = xHis father’s present age = 3x

Grandfather’s present age = 6x

⇒ | x + 3x + 6x | = | 110 |

3 | 3 |

⇒ 10x = 110

⇒ x = 11

Rajeev’s present age = 11 years

10 years ago Rajeev’s age = 1 year

His father’s present age = 33 years

10 years ago = 23 years

His grandfather’s present age = 66 years

10 years ago = 56 years

Required ratio = 1: 23: 56

Hence, option B is correct.