Question

8. A wooden article was made by scooping out a hemiphere from each end of
a solid cylinder, as shown in the figure. If the height of the cylinder is 10 cm
and its radius of the base is of 3.5 cm, find the total surface area of the
article.​

Answer 1

Step-by-step explanation:

Radius of hemisphere and cylinder= 7/2

Height of cylinder =20cm

2Curved surface area of hemisphere + Curved surface area of Cylinder.

2×2πr^2+2πrh

4πr^2+ 2πrh

2πr(h+2r)

2×22/7×7/2(20+2×7/2)

22×27

594 cm^2.

Ans.