Q:

A) 12% | B) 13% |

C) 14% | D) 15% |

Answer: D) 15%

Explanation:

Explanation:

Let the rate be R% p.a. Then,

$\left[1800{\left(1+\frac{R}{100}\right)}^{2}-1800\right]-\left(\frac{1800*R*2}{100}\right)=405$

$1800\left[\frac{{\left(100+R\right)}^{2}}{10000}-1-\frac{2R}{100}\right]=405$

$1800\left[\frac{{\left(100+R\right)}^{2}-10000-200R}{10000}\right]=405$

$\iff $

$\frac{9}{5}*{R}^{2}=405\iff {R}^{2}=\left(\frac{405*5}{9}\right)=225\iff R=15$

Rate = 15%.

Q:

A) Rs.2628 | B) Rs.2662 |

C) Rs.2600 | D) Rs.3200 |

2
676

Q:

A) Rs.400 | B) Rs.390 |

C) Rs.380 | D) Rs.350 |

2
501

Q:

A) Rs. 2000 | B) Rs. 2050 |

C) Rs. 2100 | D) Rs. 2150 |

0
454

Q:

A) 21750 | B) 22050 |

C) 23250 | D) 24650 |

0
390

1
420

Q:

A) Rs.9000 | B) Rs.9500 |

C) Rs.10,000 | D) Rs.10,500 |

1
421

Q:

A) 3 years | B) 4 years |

C) 2 years | D) 1 year |

4
879

3
560