Q. 134.4( 147 Votes )

Find the sum of t

Answer :

As we have to calculate sum of first 15 multiples of 8, series will look like:

8, 16, 24, ...........up to 15 terms

Given: First term, a = 8,Common Difference, d = 8 and nth term, n = 15

Sum of first 15 multiples of 8 can be calculated as:

Sum of n terms of an A.P is given by:




Applying the values from above


= 15 (8 + 56)


= 15 x 64


= 960

Thus sum of first 15 multiples of 8 is 960.

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