हिंदी

If principal = Rs 1,00,000, rate of interest = 10% compounded half yearly. Find Interest for 6 months. Amount after 6 months. Interest for next 6 months. Amount after one year.

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प्रश्न

If principal = Rs 1,00,000, rate of interest = 10% compounded half yearly. Find

  1. Interest for 6 months.
  2. Amount after 6 months.
  3. Interest for next 6 months.
  4. Amount after one year.
योग
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उत्तर

Principal (P) = ₹ 100000

Rate of interest (R) = 10% compounded half-yearly

i. Interest for 6 months,

We know that,

Compound interest, CI = A – P

Where, `A = P(1 + R/200)^n`  ...[For 6 months]

∴ `A = P(1 + R/200)^n = 100000(1 + 10/200)^1`  ...[∵ n = 1 for 6 months]

= `100000 xx 21/20`

= ₹ 105000

∴ Compound interest, CI = A – P

= ₹ 105000 – ₹ 100000

= ₹ 5000

ii. Amount after 6 months = ₹ 105000

iii. Interest for next 6 months

Principal = Amount after 6 months

∴ Principal (P) = ₹ 105000

Rate of interest (R) = 10%

∴ `A = P(1 + R/200)^n`

= `105000(1 + 10/200)^1`  ...[∵  n = 1 for 6 months]

= `105000 xx 21/20`

= `2205000/20`

= ₹ 110250

∵ Compound interest, CI = A – P

= ₹ 110250 – ₹ 105000

= ₹ 5250

iv. Amount after one year = ₹ 110250

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अध्याय 9: Comparing Quantities - Exercise [पृष्ठ २९६]

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एनसीईआरटी एक्झांप्लर Mathematics Exemplar [English] Class 8
अध्याय 9 Comparing Quantities
Exercise | Q 85. | पृष्ठ २९६

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