arithmetic - the speed of the van increases by 3 kms after every one hour if the distance traveled in the first one hour was 50 kms what was the total distance traveled in 10 hours - skillgun

Solution: Total distance traveled in 10 hours = (50,53,56, …. , upto 10 terms).
This is in A.P. with a = 50, n = 10, d = 3.
.'. Required distance = 10(2(50) + (10-1)3)/2 = 5(100+27) = 5*127 = 635 kms. ( '.' sum of n terms = n/2(2a+(n-1)d))