Question

Please give me correctly answer ​

Answer 1

Answer:

sum the 2,5,8 and multiply with 20

Step-by-step explanation:

2+5+8 =15 ,

15×20 =300

Answer 2

Answer:

610

Step-by-step explanation:

Here, the terms are in AP(Arithmetic Progression).

So, a = 2

d = 5 - 2 = 3

n = 20

$So, Sum = \frac{n}{2} (2a + (n - 1)d) \\ = \frac{20}{2} \times (2 \times 2 + (20 - 1) \times 3) \\ = 10 \times (4 + 19 \times 3) \\ = 10 \times (4 + 57) \\ = 10 \times 61 \\ = 610$

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