- 7 km
- 9 km
- 5 km
- 6 km
- 8 km

Option 4 : 6 km

**Given:**

Time taken to cover 5 km = 12 min late

Time taken to cover 8 km = 15 min early

**Formula used:**

Distance = speed × time

**Calculation:**

Let the distance between his college and his starting point = x km

According to question,

⇒ x/5 - x/8 = (12 + 15)/ 60

⇒ (8x - 5x)/40 = 9/20

⇒ x = (18 / 3) km

⇒ 6 km

**∴ Required distance is 6 km**

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