Correct Answer - Option 4 : 27 km

**Given,**

Vinod and Geeta walk in opposite directions at the rate of 4 km and 5 km per hour respectively

**Formula used**

distance = speed × time

**Calculations:**

sum of their individual speed = 4 + 5 = 9 km/hour

Distance covered in 3 hours = time × speed

⇒ 3 × 9 = 27 km

.∴ The required answer is **27 km**