*What should be the interest rate and duration for principal Rs. 500 for 1 y*In how many years the amount for Rs. 10000 becomes Rs

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1. Answer:

   (1) Principal = Rs 9,000

   Rate of interest = 10% p.a.

   Number of years = 3 years

   Simple Interest =Principal×Rate×Time100=9,000×10×3100= Rs 2700

   Amount = Principal + Interest = 9,000 + 2,700 = Rs 11,700

   ∴ The simple interest is Rs 2,700.

   And amount is Rs 11,700.

   (2) Principal = Rs 15,000

   Rate of interest = 11% p.a.

   Number of years = 2 years

   Simple Interest=Principal×Rate×Time100=15,000×11×2100= Rs 3300

   Amount = Principal + Interest = 15,000+ 3,300 = Rs 18,300

   ∴ The simple interest is Rs 3,300.

   And amount is Rs 18,300.

   (3) Principal = Rs 50,000

   Rate of interest = 9% p.a.

   Number of years = 4 years

   Simple Interest =Principal×Rate×Time100=50,000×9×4100= Rs 18000

   Amount = Principal + Interest = 50,000 + 18,000 = Rs 68,000

   ∴ The simple interest is Rs 18,000.

   And amount is Rs 68,000.

   (4) Principal = Rs 1, 25,000

   Rate of interest= 12% p.a.

   Number of years = 2 years

   Simple Interest =Principal×Rate×Time100=125,000×12×2100= Rs 30000

   Amount = Principal + Interest = 1,25,000 + 30,000 = Rs 1,55,000

   ∴The simple interest is Rs 30,000.

   And amount is Rs 1,55,000.

   (5) Principal = Rs 1,50,000

   Rate of interest = 10% p.a.

   Number of years = 3 years

   Simple Interest =Principal×Rate×Time100=150,000×10×3100= Rs 45000

   Amount = Principal + Interest = 1,50,000 + 45,000 = Rs 1,95,000

   ∴ The simple interest is Rs 45,000

   And amount is Rs 1,95,000.

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