Hemisphere for Competitive Exam – Quantitative Aptitude

Hemisphere (गोलार्ध) In Hindi

Hemisphere का हिंदी में अर्थ “गोलार्ध” होता है। इसका मतलब किसी गोले का आधा भाग, जब एक गोले को केंद्र पर दो बराबर भागों में काटा जाता है तो गोलार्ध बनता है।

उदाहरण –

जिस कटोरे से हम खाना खाते हैं वह आधा कटे नारियल के खोल के समान एक खोखला गोलार्ध होता है।
पृथ्वी भूमध्य रेखा द्वारा अलग होकर उत्तरी गोलार्ध और दक्षिणी गोलार्ध में विभाजित है।

Hemisphere In English

A hemisphere is a three-dimensional shape formed by cutting a sphere exactly in half along its diameter, resulting in two equal parts, with one side flat and the other forming a curved bowl. It represents half of a complete sphere.

Hemisphere Volume

The Volume of Hemisphere is determined by using the formula of volume of a sphere. The formula is used to compute the volume of a sphere, where r is the radius of the sphere.

Volume of hemisphere = (2/3)πr³
r is the radius of the hemisphere and the value of ​π is 22/7 or 3.14.

Hemisphere Surface Area
There are two ways to define the surface area of a hemisphere, depending on whether you want the total surface area or just the curved surface area.

Total Surface Area : The total surface area of the hemisphere is the area that includes the outer surface and base. It is also defined as the sum of curved surface area and the base area of the hemisphere.
Formula:

Curved Surface Area: This is the area of the rounded outer part of the hemisphere. It’s essentially half the surface area of a complete sphere.
Formula: