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The length x of a rectangle is decreasin...

The length x of a rectangle is decreasing at the rate of 3 cm/minute and the width y is increasing at the rate of 2cm/minute. When `x =10`cm and `y = 6`cm, find the rates of change of (a) the perimeter and (b) the area of the rectangle.

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The correct Answer is:
-2cm/min,
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MOTION-TANGENT & NORMAL-EXERCISE 3
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  7. The angle of intersection of the curves y =2 sin^2 x and y = cos 2 x ...

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  10. The length x of a rectangle is decreasing at the rate of 3 cm/minute ...

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  15. The tangent to the graph of the function y=f(x) at the point with absc...

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  17. Find the minimum value of (x1-x2)^2+(sqrt(2-x1^2)-9/(x2))^2 where x1...

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  18. The number of solutions of the equation |f(|x|))| – 3 = 0

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  19. The equation of the normal to the curve y^(4)=ax^(3) at (a,a) is

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