The given histogram shows the frequency distribution of the speed of cars passing though at a particular spot on a highway. Study the graph and answer the question that follows.

What percentage of cars were running with speed less than 70 km/h?

51.25%

Total number of cars = 50 + 70 + 85 +  90 + 60 + 45 = 400 

Percentage of Cars with speed less than 70 km/h =  \(\frac{50 + 70 + 85}{400}\) × 100

=  \(\frac{205}{400}\) × 100

= 51.25%