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The ratio of the total surface area and volume of a sphere is 2: 7. Its radius is:
एक गोले की कुल सतह के क्षेत्रफल और आयतन का अनुपात 2: 7. इसका त्रिज्या है:

A

10 cm

B

7.5 cm

C

7 cm

D

10.5 cm

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A solid sphere and a solid hemisphere have the same total surface area. The ratio of their volumes is (Take, pi =22/7) एक ठोस गोले और एक गोलार्ध में कुल सतह क्षेत्र समान है। उनके आयतन का अनुपात है

The curved surface area of a hemisphere with radius 7cm is: 7 सेमी त्रिज्या वाले एक अर्धगोले का वक्र पृष्ठ क्षेत्रफल कितना होगा ?

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The ratio of total surface area and volume of a sphere is 1 : 7. This sphere is melted to form small spheres of equal size. The radius of each small sphere is 1/6th the radius of the large sphere. What is the sum (in cm^2 ) of curved surface areas of all small spheres? एक गोले के कुल पृष्ठीय क्षेत्रफल तथा आयतन का अनुपात 1 : 7 है। इस' गोले को पिघलाकर बराबर माप के छोटे गोले बनाये जाते है। प्रत्येक छोटे गोले की त्रिज्या बड़े गोले की त्रिज्या 1/6 हैं सभी छोटे गोलों के वक्र पृष्ठीय क्षेत्रफल का योग ( से.मी.^2 में) क्या है?

The ratio of curved surface area and volume of a cylinder is 1: 7. The ratio of total surface area and volume is 187 : 770. What is the respective ratio of its base radius and height? एक बेलन के वक्र पृष्ठीय क्षेत्रफल तथा आयतन का अनुपात 1 : 7 है। कूल पृष्ठोय क्षेत्रफल तथा आयतन का अनुपात 187 : 770 है। इसके आधार की त्रिज्या तथा ऊँचाई क्रमशः अनुपात क्या है? Option 1- 5 : 8 Option 2- 4 : 9 Option 3- 3 : 7 Option 4- 7 : 10

If the surface area of a sphere is 346.5cm^2 , then its radius [taking pi =22/7] is- यदि एक गोले का पृष्ठ क्षेत्रफल 346.5 सेमी^2 है, तो उसकी त्रिज्या क्या होगी? (माना कि pi =22/7)

Find the volume (in cm^3 ) of a sphere whose radius is 7.5 cm. एक गोले का आयतन (in cm^3 ) ज्ञात करें जिसका त्रिज्या 7.5 सेमी है।

The total surface area of a solid cube is 2400 cm^2 . The volume of the cube is: एक ठोस घन का कुल क्षेत्रफल 2400 cm^2 है। घन की आयतन है

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