The speed of a car increases by 2 kms after every one hour. If the distance travelling in the first one hour was 40 kms. what was the total distance traveled in 12 hours?
Choose the most appropriate option
A) 252 kms B) 152 kms C) 612 kms D) 752 kms E) 152 kms
Explanation:   Total distance travelled in 12 hours =(40+42+44+.....upto 12 terms)   This is an A.P with first term, a=40, number of terms,   n= 12,d=2.   Required distance = 12/2[2 x 40+{12-1) x 2]   =6(102)   = 612 kms.   Answer: 612 kms
<result>C</result>
The speed of a car increases by 2 kms after every one hour. If the distance travelling in the first one hour was 40 kms. what was the total distance traveled in 12 hours?