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Find the area of the region bounded by the parabola y2 = 25x and the line x = 5

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प्रश्न

Find the area of the region bounded by the parabola y2 = 25x and the line x = 5

योग
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उत्तर

Given equation of the parabola is y2 = 25x

∴ y = `5sqrt(x)`   ......[∵ In first quadrant, y > 0]

Required area = area of the region OQRPO

= 2 (area of the region ORPO)

= `2 int_0^5 y  "d"x`

= `2 int_0^5 5sqrt(x)  "d"x`

= `10 int_0^5 x^(1/2)  "d"x`

= `10[(x^(3/2))/(3/2)]_0^5`

= `20/5[(5)^(3/2) - 0]`

= `20/3 (5sqrt(5))`

= `(100sqrt(5))/3` sq.units

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अध्याय 1.7: Application of Definite Integration - Q.2

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