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Two parallel sides of a rectangle are be...

Two parallel sides of a rectangle are being lengthened at the rate of 2 cm/sec while the other two sides are shortened in such a way that the aea of the rectangle is 50 sq.cm. The rate of change of the perimeter when the length of an increasing side 5 cm is

A

2 cm/sec

B

6 cm/sec

C

`-2` cm/sec

D

`-4` cm/sec

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The correct Answer is:
D
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DIPTI PUBLICATION ( AP EAMET)-APPLICATIONS OF DIFFERENTIATION-EXERCISE 1C (RATE OF CHANGE)
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  6. The side of an equilateral triangle increases at the uniform rate of 0...

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  12. The side of a cube is equal to the diameter of a sphere. If the side a...

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  13. The side of a cube is equal to the radius of a shpere. If the side and...

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  14. If the rates of increase of side of a cube and radius of a sphere are ...

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  15. The bas radius of a cylindrical vessel full of oil is 30 cm. Oil is dr...

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  16. Oil is being filled in a cylindrical tank of diameter 12 mt. The rate ...

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  17. Water is flowing into cylindrical tank of radius 7 ft in the rate of 2...

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  20. An inverted cone has a depth of 10 cm and a base of radius 5 cm. Watee...

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