Q:

Let the principal be Rs. P and the rate be R% per annum

Since it doubles in 12 years.

So, simple interest is Rs. P

12R = 100

%

Hence, rate = % per annum

Q:

A) 9850 | B) 9500 |

C) 9620 | D) 9760 |

Answer & Explanation
Answer: C) 9620

Explanation:

Explanation:

As the interest rate increases by 2%

=> (7000x3x2)/100 = 420

9200

--------

9620

2
24

Q:

A) JxJ = KL | B) KxK= JL |

C) LxL = JK | D) JKL = 1 |

Answer & Explanation
Answer: B) KxK= JL

Explanation:

Explanation:

Let the Time be 'N' and Rate be 'R'

J = (K x NR)/100 K = (L x NR)/100

J/K = NR/100 K/L = NR/100

J/K = K/L

= JL

3
18

Q:

A) 4.58 % | B) 5.96 % |

C) 6.52 % | D) 4.98 % |

Answer & Explanation
Answer: B) 5.96 %

Explanation:

Explanation:

Difference in amount = 514 - 415 = 99

99 = (415 x 4 x R)/100

R = 5.96%

2
17

Q:

A) Rs. 316 | B) Rs. 251 |

C) Rs. 154 | D) Rs. 294 |

Answer & Explanation
Answer: A) Rs. 316

Explanation:

Explanation:

S.I. for 2 years = (514 - 415) = Rs. 99

S.I. for 1 year = 99/2

Principal = (415 - 99) = Rs. 316.

1
43

Q:

A) Rs. 15,000 | B) Rs. 1,50,000 |

C) Rs. 1500 | D) Rs. 1,62,000 |

Answer & Explanation
Answer: A) Rs. 15,000

Explanation:

Explanation:

Principal = Rs.(100 x 5400)/(12 x 3)= Rs. 15000.

2
104