Find the total surface area of a hemisphere of radius 10 cm. (Use $\pi$ = 3.14)

Question

Find the total surface area of a hemisphere of radius 10 cm. (Use  $\pi$  = 3.14)

cdquestions Admin · Accepted Answer

Radius (r) of hemisphere = 10 cm
Total surface area of hemisphere = CSA of hemisphere + Area of circular end of hemisphere
= $\frac{(4\pi r^2)}{2} + \pi r^2 = 3\pi r^2$

The radius of the hemisphere, r = 10cm

Total Surface area = $3\pi r^2$
= 3 × 3.14 × 10cm × 10cm
= 942 cm²
Therefore, the total surface area of such a hemisphere is 942 cm2 .

Length (in hours)	Number of lamps
300 − 400	14
400 − 500	56
500 − 600	60
600 − 700	86
700 − 800	74
800 − 900	62
900 − 1000	48

Length (in hours)	Number of lamps
300 − 400	14
400 − 500	56
500 − 600	60
600 − 700	86
700 − 800	74
800 − 900	62
900 − 1000	48

Find the total surface area of a hemisphere of radius 10 cm. (Use \(\pi\) = 3.14)

Solution and Explanation

Top CBSE Class IX Mathematics Questions

Top CBSE Class IX Questions