A bike consumes 20 mL of petrol per kilometer if it is driven at a speed in the range of 25 ndash 50...........

Quantitative Aptitude (CDS) Time & distance

A bike consumes 20 mL of petrol per kilometer, if it is driven at a speed in the range of 25 – 50 km/hour and consumes 40 mL of petrol per kilometer at any other speed. How much petrol is consumed by the bike in travelling distance of 50 km, if the bike is driven at a speed of 40 km/hour for the first 10 km, at a speed of 60 km/hour for the next 30 km and at a speed of 30 km/hour for the last

1 L

1.2 L

1.4 L

1.6 L

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Explanation:

Speed of bike = 25 – 50 km/h
Consumption of petrol at 25-50 km/hr = 20 ml/km
and consumes petrol = 40 ml/km at other speed
Given Distance
50 km ? 10 km + 30 km + 10 km
Speed? 40 km/hr 60 km/h 30 km/hr
Petrol consumed = (10 + 10) × 20 ml + 30 × 40 ml
= 400 ml + 1200 ml = 1600 ml =1600/100
L = 1.6L.