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Ashima took a loan of Rs 1,00,000 at 12% p.a. compounded half-yearly. She paid Rs 1,12,360. If (1.06)2 is equal to 1.1236, then the period for which she took the loan is ______. - Mathematics

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Question

Ashima took a loan of Rs 1,00,000 at 12% p.a. compounded half-yearly. She paid Rs 1,12,360. If (1.06)2 is equal to 1.1236, then the period for which she took the loan is ______.

Options

  • 2 years

  • 1 year

  • 6 months

  • `1 1/2` years

MCQ
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Solution

Ashima took a loan of Rs 1,00,000 at 12% p.a. compounded half-yearly. She paid Rs 1,12,360. If (1.06)2 is equal to 1.1236, then the period for which she took the loan is 1 year.

Explanation:

Given, principal (P) = Rs. 100000

Rate of interest (R%) = 12% per annum compounded half-yearly

Let m be the time period,

Amount paid = Rs. 112360

We know that,

Amount, when interest is compounded half-yearly

i.e. `A = P(1 + R/200)^(2n)`, where n = time period

⇒ `112360 = 100000(1 + 12/200)^(2n)`

⇒ `(53/50)^(2n) = 112360/100000`

⇒ `(53/50)^(2n) = 2809/2500`

⇒ `(53/50)^2 = (53/50)^(2n)`

On comparing both sides, we get

2n = 2

⇒ n = 1

So, the time period is 1 year.

Hence, 1 year

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Chapter 9: Comparing Quantities - Exercise [Page 288]

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NCERT Exemplar Mathematics [English] Class 8
Chapter 9 Comparing Quantities
Exercise | Q 8. | Page 288

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