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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8

The cost of a machine is ₹ 18000 and it depreciates at 1623% annually. Its value after 2 years will be ___________ - Mathematics

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Question

The cost of a machine is ₹ 18000 and it depreciates at `16 2/3 %` annually. Its value after 2 years will be ___________

Options

  • ₹ 12000

  • ₹ 12500

  • ₹ 15000

  • ₹ 16500

MCQ
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Solution

₹ 12500

Explanation;

Hint:

Cost of machine = 18000

Depreciation rate = `16 2/3 % = 50/3 %` p.a

Time period = 2 years

∴ As per depreciation formula,

Depriciated value = Original value `(1 - "r"/100)^"n"`

Substituting in above formula, we get

Depreciated value after 2 years

= `18000(1 - (50/3)/100)^2`

= `18000(1 - 50/(100 xx 3))^2`

= `18000(1 - 1/6)^2`

= `1800 xx (5/6)^2`

= `18000 xx 5/6 xx 5/6`

= ₹ 12,500

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Chapter 4: Life Mathematics - Exercise 4.3 [Page 139]

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Samacheer Kalvi Mathematics [English] Class 8 TN Board
Chapter 4 Life Mathematics
Exercise 4.3 | Q 13 | Page 139

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