Question:
If the total surface area of a hemisphere is 1848 cm², find its radius.
यदि एक अर्धगोले का कुल पृष्ठीय क्षेत्रफल 1848 cm² है, तो इसकी त्रिज्या ज्ञात कीजिए।
Options:
- a) 14 cm
- b) 7 cm
- c) 21 cm
- d) 10 cm
- a) 14 cm
- b) 7 cm
- c) 21 cm
- d) 10 cm
correct answer : a)
Explanation:
Total Surface Area of a hemisphere = 3 * pi * r^2
1848 = 3 * (22/7) * r^2
1848 = (66/7) * r^2
r^2 = 1848 * 7 / 66 = 28 * 7 = 196
r = √196 = 14 cm.
अर्धगोले का कुल पृष्ठीय क्षेत्रफल = 3 * pi * r^2
1848 = 3 * (22/7) * r^2
1848 = (66/7) * r^2
r^2 = 1848 * 7 / 66 = 28 * 7 = 196
r = √196 = 14 cm.