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 10 hours of the journey.	Choose the correct choice from the following choices:
A) 278 km  B) 390 km  C) 267 km  D) 286 km  E) 296 km
The total distance covered by the car in the first 10 hours   = 30 + 32 + 34 + 36 + 38 + 40 + 42 + 44 + 46 + 48   = sum of 10 terms in AP whose first term is 30 and last term is 48   = 10/2 [30 + 48] = 390 km.   Answer: 390 km
<result>B</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 10 hours of the journey.