A car started running at a speed of 30 km/hr and the speed of the car was increased by 2 km/hr at the end of every hour. Find the total distance covered by the car in the first 7 hours of the journey.	Select
A) 342 km
B) 352 km
C) 252 km
D) 742 km
E) 382 km
The total distance covered by the car in the first 7 hours = 30 + 32 + 34 + 36 + 38 + 40 + 42 = sum of 7 terms in AP whose first term is 30 and last term is 42 = 7/2 [30 + 42] = 252 km.   ANSWER:252 km
<result>C</result>
A car started running at a speed of 30 km/hr and the speed of the car was increased by 2 km/hr at the end of every hour. Find the total distance covered by the car in the first 7 hours of the journey.