Question

the sum of first 100 multiples of 8 is?option,A 20200,B, 80800,C, 40400,D, 50500​

Answer 1

Answer:

First multiple of 8(first term (a)) = 8

100th multiple of 8(last term(l))=800

Therefore, Sum of 100 multiples of 8 = 100/2(8 +800)

=50*808

=40400

Therefore the answer is C)40400

Step-by-step explanation:

Using the formula of Sum of A.P. :n/2[ 2a + (n-1)d]