Sunita invested Rs. 12,000 on simple interest at the rate of 10% p.a.

1.	Sunita invested Rs. 12,000 on simple interest at the rate of 10% p.a. to obtain a total amount of Rs. 20,400 after a certain period. For how many years did she invest to obtain the above amount?1. 92. 63. 74. 8
Answer» Correct Answer - Option 3 : 7 Given: Principal (P) = Rs. 12,000 Rate of interest (R) = 10% Amount (A) = Rs. 20,400 Formula used: A = P + SI SI = (P × R × T)/100 Where P is Principal, R is Rate of interest, T is Time and SI is Simple Interest Calculation: A = P + SI 20400 = 12000 + SI ⇒ SI = 20400 – 12000 = 8400 SI = (P × R × T)/100 ⇒ 8400 = (12000 × 10 × T)/100 ⇒ 8400 = 1200 × T ⇒ T = 8400/1200 years ⇒ 7 years ∴ Time is 7 years

Sunita invested Rs. 12,000 on simple interest at the rate of 10% p.a. to obtain a total amount of Rs. 20,400 after a certain period. For how many years did she invest to obtain the above amount?1. 92. 63. 74. 8

Answer» Correct Answer - Option 3 : 7

Given:

Principal (P) = Rs. 12,000

Rate of interest (R) = 10%

Amount (A) = Rs. 20,400

Formula used:

A = P + SI

SI = (P × R × T)/100

Where P is Principal, R is Rate of interest, T is Time and SI is Simple Interest

Calculation:

A = P + SI

20400 = 12000 + SI

⇒ SI = 20400 – 12000 = 8400

SI = (P × R × T)/100

⇒ 8400 = (12000 × 10 × T)/100

⇒ 8400 = 1200 × T

⇒ T = 8400/1200 years

⇒ 7 years

∴ Time is 7 years

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Sunita invested Rs. 12,000 on simple interest at the rate of 10% p.a. to obtain a total amount of Rs. 20,400 after a certain period. For how many years did she invest to obtain the above amount?1. 92. 63. 74. 8

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