1.

A sum of Rs 720 amounts to Rs 882 at simple interest in \(1\frac{1}{2}\) years. In how many years will the sum Rs 800 amounts to Rs 1040 at the same rate?1). 25/72). 43). 31/74). 2

Answer»

GIVEN: Principal = Rs. 720

Amount after 3/2 years = Rs. 882

We KNOW that,

A = P + (P × R × T)/100

⇒ 882 = 720 + (720 × R × 3/2)/100

⇒ 16200 = 720 × R × 3/2

⇒ R = 16200/(720 × 1.5)

⇒ R = 15%

New Principal = Rs. 800, new Amount = Rs. 1040

⇒ 1040 = 800 + (800 × 15 × t)/100

⇒ 24000 = 800 × 15 × t

⇒ t = 2 years

∴ the correct option is 4)



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