Question

Self help group wants to manufacture jokers caps of 3 cm radius and 4 cm height FB available colour papers sheet is housand CM square then how many caps can be manufactured from that paper sheet?

Answer 1

height = 4
radius= 3
slant height =√16+9
=√25
=5
curved surface area = πrl
= 22÷7×3×5
=47.14 ( approx)
sheet available for making cap = 1000cm sq
number of caps = 1000÷47.14
= 21.21 ( approx )

Answer 2

Answer:

21

Step-by-step explanation:

Radius of cap = 3 cm

Height of cap = 4 cm

Slant height = $l=\sqrt{Height^2+Radius^2}$

                    =$\sqrt{4^2+3^2}$

                    =$\sqrt{16+9}$

                    =$\sqrt{25}$

                    =$5$

Lateral surface area of cone = $\pi r l$

                                               = $3.14 \times 3 \times 5$

                                               = $47.1 m^2$

So, area of 1 cap is 47.1 sq.m.

Now Area of sheet = 1000 sq.m.

So, No. of caps can be made from that sheet = $\frac{1000}{47.1}$

                                                                           = $21.231$

Thus 21 caps can be manufactured from that paper sheet.