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%.

4
1048

4
908

Q:

A) ₹ 40000 | B) ₹ 40500 |

C) ₹ 39800 | D) ₹ 40250 |

2
955

Q:

A) Rs.250000 | B) Rs.200000 |

C) Rs.350000 | D) Rs.550000 |

0
921

Q:

A) 13270 | B) 13000 |

C) 13300 | D) 13310 |

1
4475

2
1002

4
830

Q:

A) 6998.4 | B) 6960 |

C) 6784.4 | D) 6869.4 |

1
904