The speed of a car increases by 2kms after every one hour. If the distance travelled in the first one hour was 35kms, what was the total distance travelled in 12 hours?  Choices:
A) 456kms
B) 482kms
C) 552kms
D) 556kms
E) None of these
Total distance travelled in 12 hours = (35+37+39+...upto 12 terms).   This is an A.P. with first term, a=35, number of terms, n=12, common difference d=2   Required distance = 12/2(2*35+(12-1)*2)=6(70+22)=552km.   552kmsorrect Option: 552kms
<result>C</result>
The speed of a car increases by 2kms after every one hour. If the distance travelled in the first one hour was 35kms, what was the total distance travelled in 12 hours?