Round table

A tablecloth should be sewn on a round table with a diameter of 78 cm, which should extend around the table by 10 cm. How many cms of ribbons need to be bought for edging?

Correct answer:

x =  307.9 cm

Step-by-step explanation:

D=78 cm a=10 cm  r=D/2=78/2=39 cm r2=r+a=39+10=49 cm  x=2π r2=2 3.1416 49=307.9 cm



Did you find an error or inaccuracy? Feel free to write us. Thank you!



avatar




You need to know the following knowledge to solve this word math problem:


 
We encourage you to watch this tutorial video on this math problem: video1

Related math problems and questions:

  • Round table tablecloth
    obrus The round table has an area of 50.24 dm2. Calculate the circular tablecloth diameter, if it extends beyond the edge of the table by 30 cm.
  • Tablecloth
    krajka The table top is 90 cm long and 50 cm wide. How many cm lace edging is necessary for the tablecloth that hangs on each side by 10 cm?
  • Round table
    obrus-kruhovy Round table with diameter d = 105 cm is coated by square tablecloth with a side length 121 cm. About how many cm is higher center of tablecloth than its cornes?
  • Square and circle
    circle_square Into square is an inscribed circle with diameter 10 cm. What is the difference between circumference square and circle?
  • A bicycle
    cyclist A bicycle wheel has a diameter of 63 cm. Calculate how many times the wheel turns round in travelling 19.8 km .
  • Washer
    pracka The washing machine drum washes at 71 RPM. The washing machine motor pulley has a diameter of 8 cm. What must be the diameter of the drum machine pulley when the motor is at 351 RPM?
  • Table
    stol Find the circumference of the table, where the long side is 1.28 meters and the short side is 86 cm.
  • Metal rails
    22 Dad needs to improve the edges of the wooden boxes - to be reinforced with metal rails. How many cms of rails will he need if the box has the shape of a prism with the length of the edges 70cm 70cm and 120cm?
  • The hollow cylinder
    duty_valec The hollow cylinder has a height of 70 cm, an outer diameter of 180 cm, and an inner diameter of 120 cm. What is the surface of the body, including the area inside the cavity?
  • Radius of the circle
    circle_axes Calculate the radius of the circle whose length is 107 cm larger than its diameter
  • Two squares
    squares2 Two squares whose sides are in the ratio 5:2 have a sum of its perimeters 73 cm. Calculate the sum of the area of these two squares.
  • CD disc
    CD_disc A compact disc has a diameter of 11.8 cm. What is the surface area of the disc in square centimeters?
  • Bike wheel
    wheel The bike wheel has a radius of 30cm. How many times does it turn if we go on a 471m bike?
  • Circle - easy 2
    circle The circle has a radius 6 cm. Calculate:
  • Wood planks
    fosny 1 m3 of wood planks costs 179 EUR. How much will I pay for 11 planks measuring 6 cm, 10 cm and 6 m?
  • Central angle
    obluk What is the length of the arc of a circle with a diameter of 46 cm, which belongs to a central angle of 30°?
  • Diameter to area
    circle_eq Find the area of a circle whose diameter is 26cm.