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A Manufacturer Estimates that His Machine Depreciates by 15% of Its Value at the Beginning of the Year. Find the Original Value (Cost) of the Machine, If It Depreciates by Rs. 5,355 - Mathematics

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प्रश्न

A manufacturer estimates that his machine depreciates by 15% of its value at the beginning of the year. Find the original value (cost) of the machine, if it depreciates by Rs. 5,355 during the second year.

योग
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उत्तर

Let the original cost of the machine = Rs. 100.

∴ Depreciation during the 1st year = 15% of Rs. 100 = Rs, 15.

Value of the machine at the beginning of the 2nd year

= Rs.100 - Rs.15 = Rs. 85

∴ Depreciation during the 2nd year = 15% of Rs. 85 = Rs. 12.75

Now, when depreciation during 2nd year = Rs, 12.75,

original cost = Rs. 100

∴ when depreciation during 2nd year = Rs. 5,355.

Original cost = Rs. `100/12.75 xx 5,355` = Rs. 42,000.

Hence, original cost of the machine is Rs. 42,000.

shaalaa.com
Concept of Compound Interest - Compound Interest as a Repeated Simple Interest Computation with a Growing Principal
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Compound Interest (Without using formula) - Exercise 2 (B) [पृष्ठ ३३]

APPEARS IN

सेलिना Concise Mathematics [English] Class 9 ICSE
अध्याय 2 Compound Interest (Without using formula)
Exercise 2 (B) | Q 7 | पृष्ठ ३३

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