Question

This came in my paper today please solve it fast for 100 points

The income of a person is rs. 3,00,000 in the first year and he recieves an increase of rs. 10,000 to his income per year for the next 19 yrs. find the the total amount? he received in 20 years???

Answer 1

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This already i solved so, here this goes

This can be solve by A.P

A= 300000
D = 10000

n = 20

using sum formula ,

S20 = $\frac{20}{2} \times (600000 + 19 \times 10000) \\ = 10(790000) \\ = 7900000$

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Answer 2

$\underline{\underline{\Huge\mathfrak{Solution ;}}}$

Finding the value according to A.P. ;-

As ;-
A = 300000
D = 10000
and n = 20

Now ,

$= >s20 = \frac{20}{2} \times (600000 + 19 \times 10000)$

$= > 10 \times 790000 = 7900000$

Therefore ,
The answer is $<b> 7900000</b>$