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# The amount of pollution content added in air in a city due to x-diesel vehicles is given by P(x) = 0.005x^3 + 0.02x^2 + 30x. - CBSE (Commerce) Class 12 - Mathematics

ConceptIncreasing and Decreasing Functions

#### Question

The amount of pollution content added in air in a city due to x-diesel vehicles is given by P(x) = 0.005x3 + 0.02x2 + 30x. Find the marginal increase in pollution content when 3 diesel vehicles are added and write which value is indicated in the above question.

#### Solution

Given,P(x) = 0.005x3 + 0.02x2 + 30x.

Differentiating both sides with respect to x, we have

marginal increase in pollution content = (dP(x)/(dx))=0.015x^2+0.04x+30......(1)

Putting x = 3 in (1), we have ((dP(x))/dx)_(x=3)=0.015xx9+0.04xx3+30=30.255

Therefore, the value of marginal increase in pollution content is 30.255

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Solution The amount of pollution content added in air in a city due to x-diesel vehicles is given by P(x) = 0.005x^3 + 0.02x^2 + 30x. Concept: Increasing and Decreasing Functions.
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