The speed of a car is increased by 2 km after every hour.If the distance traveled in the first hour was 35 km, what was the total distance traveled in 12 hours?
A. 522 km
B. 456 km
C. 556 km
D. 482 km
E. none
Solution(By Examveda Team)
A_______35kmph__________37kmph_________ ................................ ________55kmph_________57kmph_____B
Speed increase in AP.
Common difference (d)= 2
No. of term = 12
First term (a)= 35.
12th term = a + 11d = 35 + 2*11 = 57.
Sum = (No.of terms /2) * (first term + last term)
Sum = (12 /2) *(35 + 57) = 552.
Total distance traveled = 552 Km.
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super explanation.....
@SinPrince because the speed in increasing every hour
why cannot it be solved using s=ut + 1/2 *a*t^2 ?
552km