Home › Bihar Board Class 12 (Commerce) › Mathematics › Application of Integrals › The area of an elementary vertical strip of heig…
The area of an elementary vertical strip of height y and width dx is written as which of these?
AdA = x dy
BdA = y dx
CdA = dy/dx
DdA = y² dx
Answer & Solution
Correct answer: B. dA = y dx
A thin strip of height y and width dx has area y dx, and adding the strips gives the integral.
Related questions
Pappus's second theorem: revolved volume equals area times?A representative disc of radius r and thickness w has what volume?Which method uses slices parallel to the axis of revolution?Which method slices a solid of revolution perpendicular to the axis of revolution?What is a solid of revolution?What is the area of the upper half of the ellipse x²/36 + y²/4 = 1?An arch y = 4x - x² rises from the axis and returns to it. Area beneath the arch?A triangular patch is bounded by x + y = 2 and the two coordinate axes. Its area is?