Home
Class 12
MATHS
The sides of an equilateral triangle are...

The sides of an equilateral triangle are increasing at the rate of 2 cm/sec. Find the rate at which the area increases, when the side is 10 cm.

Text Solution

Verified by Experts

Area of an equilateral triangle, `A=frac{sqrt{3}}{4} a^{2}` where

`a=` Side of an equilateral triangle

Given:

`frac{d a}{d t}=2 {cm} / {s}`

Now,

...
Promotional Banner

Topper's Solved these Questions

  • DEFINITE INTEGRALS

    RD SHARMA|Exercise Solved Examples And Exercises|567 Videos
  • DETERMINANTS

    RD SHARMA|Exercise Solved Examples And Exercises|403 Videos

Similar Questions

Explore conceptually related problems

The sides of an equilateral triangle are increasing at the rate of 2cm/sec. Find the rate at which the area increases,when the side is 10cm.

The sides of an equilateral triangle are increasing at the rate of 2 cm/sec. The rate at which the area increases, when the side is 10 cm is

The sides of an equilateral triangle are increasing at the rate of 2 cm/sec. How far is the area increasing when the side is 10 cms?

The side of an equilateral triangle is increasing at the rate of 2 cm/s. At what rate is its area increasing when the side of the triangle is 20 cm?

Surface area of cube is increasing at rate of 3.6 cm^2/s . Find the rate at which its volume increases when lengths of side a is 10 cm.

The side of an equilateral triangle is increasing 10 cm/sec at the rate of Find the rate of increase of its perimeter.

The area of an equilateral triangle of side a feet is increasing at the rate of 4 sq.ft./sec .The rate at which the perimeter is increasing is

The area of an equilateral triangle of side a feet is increasing at the rate of 4 sq.ft./sec. The rate at which the perimeter is increasing is

RD SHARMA-DERIVATIVES AS A RATE MEASURER -Solved Examples And Exercises
  1. The radius of a circle is increasing uniformly at the rate of 4 cm/...

    Text Solution

    |

  2. If the area of circle increases at a uniform rate, then prove that the...

    Text Solution

    |

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

    Text Solution

    |

  4. The radius of a balloon is increasing at the rate of 10 cm/sec. At ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  10. Two men A and B start with velocities v at the same time from the junc...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  13. A man 2 metres high walks at a uniform speed of 6 km/hr away from a ...

    Text Solution

    |

  14. A man is walking at the rate of 6.5 km/hr towards the foot of a tower ...

    Text Solution

    |

  15. A man 2m tall, walks at the rate of 1 2/3m//s e c towards a street lig...

    Text Solution

    |

  16. A ladder 5 m long is leaning against a wall. The bottom of the ladd...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |