A sum doubles in 8 years at simple interest. Rate is MCQ with Answer and Explanation

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A sum doubles in 8 years at simple interest. Rate is

A. 12.5%

B. 15%

C. 8%

D. 10%

Answer: Option A

Solution (By JKSSB Mock Tests)

R = 100/8 = 12.5%.

This question belongs to: Maths Simple Interest

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Question #1

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A sum of Rs. 495000 amounts to Rs. 693000 in 4 years at simple interest. The rate is

A. 10%

B. 8%

C. 9%

D. 12%

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Correct Answer: Option A

Explanation:
SI = 198000. R = (198000 × 100)/(495000 × 4) = 10%.

This question belongs to: Maths Simple Interest

Question #2

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Simple interest on Rs. 504000 for 3 years at 17% per annum is

A. Rs. 256840

B. Rs. 257240

C. Rs. 257040

D. Rs. 257440

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Correct Answer: Option C

Explanation:
SI = (504000 × 17 × 3)/100 = 257040.

This question belongs to: Maths Simple Interest

Question #3

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The principal giving Rs. 235200 SI in 7 years at 12%

A. Rs. 279000

B. Rs. 280000

C. Rs. 278000

D. Rs. 281000

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Correct Answer: Option B

Explanation:
P = (235200 * 100)/(12 * 7) = 280000.

This question belongs to: Maths Simple Interest

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