Correct Answer - Option 2 : 100 km

**Given:**

Speed of car = 45 kmph

Speed of bike = 70 kmph

**Formula used:**

Speed = Distance/ Time

m/ s = 5/ 18 km/hr

**Calculation:**

Distance travelled by car = 45 × 4

⇒ Distance travelled by car = 180 km

Distance travelled by bike = 70 × 4

⇒ distance travelled by bike = 280 km

Difference = 280 – 180

**∴**** Difference between both the vehicles after 4 hours is 100 km**