Question

A wooden article was made by scooping out a hemisphere from each end of a solid cylinder if the height of the cylinder is 4cm and it's radius of the base of 2cm write the formula to find the total surface area of the article

Answer 1

Answer:

Given:

Height of Cylinder = h=h =10=10 cm

Radius of Cylinder = Radius of Hemispheres = r=r= 3.53.5 cm

Surface area of article = CSA of cylindrical part + 2 x CSA of hemispherical part

=2\pi rh+2\times 2\pi r^2=2πrh+2×2πr

2

=2\pi \times 3.5\times 10 + 2\times 2\pi \times 3.5^2=2π×3.5×10+2×2π×3.5

2

= 70\pi + 49\pi=70π+49π

=119\pi = 119 \times \dfrac{22}{7}=119π=119×

7

22

= 17 \times 22=17×22

= 374=374 cm ^2

2

Answer 2

Answer:

8 cm

Step-by-step explanation:

length x breath

4 CM x 2 CM

= 8cm