Question

A car driver driving in a fog passes a pedestrian who was walking at the rate of $2km/hr$ in the same direction The pedestrian could see the car for $6$ minutes and it was visible to him up to a distance of $0.6km$. What was the speed of the car?

• A. $15km/hr$
• B. $30km/hr$
• C. $20km/hr$
• D. $8km/hr$

Answer 1

Answer: (D)

$8km/hr$

Traveller distance in $6$ min is:

$\frac{2}{60}\times 6=\frac{2}{10}$

Total distance in $6$ min is:

$\frac{2}{10}+\frac{6}{10}=\frac{8}{10}$

Speed =$\frac{8}{10}\times 10=8$ km/hr.

Hence, the speed of the car is $8$ km/hr.