1.

What principal on compound interest has their amount Rs. 650 in one year and Rs. 676 in two years?1. Rs. 5202. Rs. 5723. Rs. 6004. Rs. 625

Answer» Correct Answer - Option 4 : Rs. 625

Given:

Amount in one year = 650

Amount in two years = 676

Concept used:

Amount = P(1 + R/100)T

Calculation:

Let the principal be x.

For one year,

⇒ x(1 + R/100)1 = 650      ----(1)

For two years,

⇒ x(1 + R/100)2 = 676      ----(2)

Dividing equation (2) and (1),

[x(1 + R/100)2]/[x(1 + R/100)1] = 676/650

⇒ (1 + R/100) = 26/25

From equation (1),

⇒ x(26/25) = 650

⇒ x = (650 × 25)/26

⇒ x = 25 × 25

⇒ x = 625

∴ The principle is Rs. 625.



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