Question

What is the approximate square root of the sum of first 20 natural number?

Answer 1

Answer:

14.49

Step-by-step explanation:

sum of first 20 natural no. is calculated by this formula

Here n is the total number of numbers in the series.

s =20 ( 20 + 1 ) / 2 = 210

so √(210) ≈ 14.49

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Answer 2

Answer:

Ap=1,2,3,.......,20

Sn=n/2×(A+L)

S20= 20÷2×(1+20)

= 10×21

S20 =210

Therefore the sum of first twenty terms is 210.

hope it helps!!

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