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The radius of a balloon is increasing at...

The radius of a balloon is increasing at the rate of 10 cm/sec. At what rate is the surface area of the balloon increasing when the radius is 15 cm?

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RD SHARMA ENGLISH-DERIVATIVES AS A RATE MEASURER -All Questions
  1. If the area of circle increases at a uniform rate, then prove that the...

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  2. The sides of an equilateral triangle are increasing at the rate of ...

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  4. A spherical ball of salt is dissolving in water in such a manner that ...

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  5. Find an angle theta , which increases twice as fast as it sine.

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  6. A stone is dropped into a quiet lake and waves move in circles at a...

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  7. differentiate xsinx with respect to x.

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  8. The volume of a cube is increasing at a rate of 9 cm^3/sec . How fast...

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  9. The volume of a cube is increasing at a constant rate. Prove that the ...

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  10. find f ' (x) if f(x) = sinxlogx

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  11. For the curve y=5x-2x^3 , if x increases at the rate of 2 units/sec, t...

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  12. The length  of a rectangle is decreasing at the rate of 2 cm/sec a...

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  13. find f '(x) if f(x)= log(logx)

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  14. find dy/dx if y= sinx.cosx

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  15. find dy/dx if y = x tanx

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  16. A ladder of length 5 m is leaning against a wall. The bottom of ladde...

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  17. The two equal sides of an isosceles triangle with fixed base b are dec...

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  18. An airforce plane is ascending vertically at the rate of 100 km/h. ...

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  19. Water is dripping out from a conical funnel of semi-vertical angle pi/...

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  20. Sand is pouring from a pipe at the rate of 12 c m^3//s . The falling s...

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