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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएचएससी वाणिज्य कक्षा ११

Machine A costs ₹ 15,000 and machine B costs ₹ 20,000. The annual income from A and B are ₹ 4,000 and ₹ 7,000 respectively. Machine A has a life of 4 years and B has a life of 7 years.

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प्रश्न

Machine A costs ₹ 15,000 and machine B costs ₹ 20,000. The annual income from A and B are ₹ 4,000 and ₹ 7,000 respectively. Machine A has a life of 4 years and B has a life of 7 years. Find which machine may be purchased. (Assume discount rate 8% p.a) [(1.08)–4 = 0.7350, (1.08)–7 = 0.5835]

योग
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उत्तर

For Machine A:

Present value of outflow = ₹ 15,000

a = ₹ 4000, i = 8% = 0.08, n = 4

P = `"a"/"i" [1 - (1 + "i")^"n"]`

= `4000/0.08 [1 - (1 + 0.08)^4]`

= `4000/0.08 [1 - (1.08)^4]`

= `4000/0.08 [1 - 0.7350]`

= 50,000 (0.265)

= ₹ 13,250

For Machine B:

Present value of outflow = ₹ 20,000

a = ₹ 7000, i = 8% = 0.08, n = 7

P = `"a"/"i" [1 - (1 + "i")^"n"]`

= `7000/0.08 [1 - (1 + 0.08)^7]`

= `7000/0.08 [1 - (1.08)^7]`

= `7000/0.08 [1 - 0.5835]`

= 87,500 (0.4165)

= ₹ 36443.75

Machine B is more than Machine A, Machine B may be purchased.

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अध्याय 7: Financial Mathematics - Miscellaneous Problems [पृष्ठ १७३]

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सामाचीर कलवी Business Mathematics and Statistics [English] Class 11 TN Board
अध्याय 7 Financial Mathematics
Miscellaneous Problems | Q 6 | पृष्ठ १७३

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