Question

Disc of radius 4 cm are cut from a rectangular plastic sheet of length 84 and width 24 cm. Find the number of perfect disc can be cut out from the rectangular sheet ​

Answer 1

Answer:

If the radius of the circle is 4, then the diameter is 8. Therefore you need an 8 by 8 square cut outs out of 84 by 24 rectangular cardboard to make a circle.

Answer 2

The number of perfect circular discs that can be cut from the rectangular sheet is 30.

Now the radius of the disc =4cm

Hence diameter = $4\times 2=8$ cm

Now to cut perfect discs from the rectangular sheets, we have to find how many circles can occupy along the length.

length =84 cm

Number of a perfect circular disc along the length = $84\div9=10.5\approx10$

So 10 discs can be cut from the length of the sides.

Now for the width, we have 24 cm

Number of circular discs from the width$= 24\div 8=3$ cm

So we can have 10 discs along the length and have 3 rows of discs.

Total number of discs = $10 \times 3 = 30$

Therefore a total of 30 perfect discs can be cut out from the rectangular sheets.

To learn more about circle and rectangle visit:

https://brainly.in/question/54918731

https://brainly.in/question/19042071

#SPJ3