సంవత్సరానికి 8% బారువడ్డీతో మొత్తం డబ్బు \(3\frac{1}{2}\) సంవత్సరాలలో రూ.608 అవుతుంది. పెట్టుబడి పెట్టిన మొత్తం కనుగొనండి?

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RRB ALP CBT I 30 Aug 2018 Shift 3 Official Paper
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  1. రూ. 450
  2. రూ. 475
  3. రూ. 440
  4. రూ. 460

Answer (Detailed Solution Below)

Option 2 : రూ. 475
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ఇచ్చినది:

సంవత్సరానికి 8% బారువడ్డీతో మొత్తం డబ్బు \(3\frac{1}{2}\) సంవత్సరాలలో రూ.608 అవుతుంది. ( \(3\frac{1}{2}\) అంటే 3.5 సంవత్సరాలు.)

ఉపయోగించిన భావన:

బారువడ్డీ, SI = (P × R × T)/100

మొత్తం = P + SI

ఇక్కడ

P = అసలు మొత్తం

R = సంవత్సరానికి వడ్డీ రేటు

T = సంవత్సరాలలో సమయం

గణన:

పెట్టుబడి మొత్తం రూ.P

ప్రశ్న ప్రకారం,

P + (P × 8 × 3.5)/100 = 608

⇒ P + 0.28P = 608

⇒ 1.28P = 608

⇒ P = 608/1.28

⇒ P = 475

∴ పెట్టుబడి పెట్టిన మొత్తం రూ. 475.

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