posted by .

The radii of two cylinders 3:2 and height 7:4.find the ratios of their curved surface area.

  • Math -

    a = 2pi*r*h
    a' = 2pi(2/3 r)(4/7 h) = 2pi*rh*8/21

    a:a' = 1:8/21 = 21:8

    Note that the ratio is just the product of the linear ratios.

  • Math -

    Thank you

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    A cone of height 24cm has a curved surface area 550 cm2 . Find its volume.
  2. math

    1. Find the expense at 60 cents a square foot of polishing the curved surface of a marble column in the shape of the frustum of a right circular cone whose slant height is 12 ft. and the radii of whose bases are 3ft 6in and 2ft 4in …
  3. maths

    A metal pipe is 63cm long. Inner diameter of a cross section is 6m and the outer diameter is 8cm find:-surface area of the base a , surface area of the base b , the outer curved surface area inner curved surface area total surface …
  4. surface area and volume

    The diameter of two cones are equal if their slant height are in the ratio 5:4, find the ratio of their curved surface area
  5. Maths

    (1) A cone has height of 8cm and circular radius 6cm calculate (a) It's Volume (b) It's Slant Height (c) The Curved Surface Area (d) The Total Surface Area
  6. Math

    how to find the curved surface area of a cone when the height is 25mm and circumference is 132mm ?
  7. Surface areas and volumes

    The inner diameter of a circular well is 3.5m .It is 10m deep (a) find the inner curved surface area (b)the cost of plastering the curved surface at the rate of 40/-per m^2
  8. math

    The Curved surface area of the cylinder is 1760cm^2 .and its volume is 12320 cm^3. Find its height
  9. Math

    If two cylinders are similar, find the scale factor of the smaller figure to the larger figure. The surface area of the smaller area is 20 pi yards squared. The surface area of the larger cylinder is 125 pi yards squared. No radius …
  10. math

    Find, in term of pie , the curved surface area of a with circular base diameter 10cm and height 12cm

More Similar Questions