This question was previously asked in

DSSSB TGT Computer Science General Section - 7 Aug 2021 Shift 1

- 5 years
- 4 years
- 3 years
- 6 years

Option 2 : 4 years

**Given:**

The sum = 1200

The amount = 1560

The time 3 years

**Concept:**

The simple interest = (Principle × Time × Rate)/100

**Calculation:**

Let be assume the rate of interest is R

⇒ 1560 - 1200 = (1200 × 3 × R)/100

⇒ 360 = 3600R/100

⇒ R = 10

⇒ In second condition let be assume time is T

⇒ 1120 - 800 = (800 × 10 × T)/100

⇒ 320 = 8000T/100

⇒ T = 4

**∴ The required result will be 4.**

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