A truck running from a city at a speed of 40 km hr and the speed of the truck was increased by 2 km ...........

Quantitative Aptitude ( CCS) Time & distance

A truck running from a city at a speed of 40 km/hr and the speed of the truck was increased by 2 km/hr at the end of every hour. Find the total distance covered by the truck in the first 5 hours of the journey.

180 km

120 km

220 km

90 km

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Explanation:

The total distance covered by the truck in the first 5 hours = 40 + 42 + 44 + 46 + 48
sum of five terms in AP whose first term is 40 and last term is 48 = 5/2 [40 + 48] = 220 km.