Question

Please i want to calculate summation of 0.30+0.60+0.90............+3.0

what is the formulae to get it

Answer 1

16.5.

Explanation:

This is an arithmetic series because the increase is a constant 0.30.

Sum of n terms = (n/2)[a + l) where n = no.of terms a = first term , l = last term.

There are 3/ 0.3 = 10 terms so

Sum = (10/2) (0.3 + 3.0)

= 5 * 3.3

= 16.5.