If the rate of change of radius of a circle is 6 cm/s then find the ra – McqOptions

MCQOPTIONS

1.	If the rate of change of radius of a circle is 6 cm/s then find the rate of change of area of the circle when r=2 cm.
A.	74.36 cm<sup>2</sup>/s
B.	75.36 cm<sup>2</sup>/s
C.	15.36 cm<sup>2</sup>/s
D.	65.36 cm<sup>2</sup>/s
Answer» C. 15.36 cm<sup>2</sup>/s

Discussion

No Comment Found

Related MCQs

The volume of a cube of edge x is increasing at a rate of 12 cm/s. Find the rate of change of edge of the cube when the edge is 6 cm.
For which of the values of x, the rate of increase of the function y=3x<sup>2</sup>-2x+7 is 4 times the rate of increase of x?
The length of the rectangle is changing at a rate of 4 cm/s and the area is changing at the rate of 8 cm/s. What will be the rate of change of width if the length is 4cm and the width is 1 cm.
The total cost N(x) in rupees, associated with the production of x units of an item is given by N(x)=0.06x<sup>3</sup>-0.01x<sup>2</sup>+10x-43. Find the marginal cost when 5 units are produced.
If the circumference of the circle is changing at the rate of 5 cm/s then what will be rate of change of area of the circle if the radius is 6cm.
At what rate will the lateral surface area of the cylinder increase if the radius is increasing at the rate of 2 cm/s when the radius is 5 cm and height is 10 cm?
The total cost P(x) in rupees associated with a product is given by P(x)=0.4x<sup>2</sup>+2x-10. Find the marginal cost if the no. of units produced is 5.
The rate of change of area of a square is 40 cm<sup>2</sup>/s. What will be the rate of change of side if the side is 10 cm.
The edge of a cube is increasing at a rate of 7 cm/s. Find the rate of change of area of the cube when x=6 cm.
If the rate of change of radius of a circle is 6 cm/s then find the rate of change of area of the circle when r=2 cm.