The speed of a car is 20 metres/second. The distance (in kilometres) travelled by the car in 2 hours and 20 minutes is: 

Correct option is B

Given:

Speed of the car = 20 metres/second

Time = 2 hours 20 minutes 

Formula Used:

Distance = Speed × Time

Solution:

Convert the time into seconds.

1 hour = 60 minutes = 3600 seconds

2 hours = 2 × 3600 = 7200 seconds

20 minutes = 20 × 60 = 1200 seconds

So, total time in seconds = 7200 + 1200 = 8400 seconds

Distance = 20 × 8400 = 168,000 metres

​$$\text{Distance in kilometres} = \frac{168,000}{1000} = 168 \, \text{kilometres}$$ 

​The car travels 168 kilometres in 2 hours and 20 minutes.​