उस गोले का आयतन ज्ञात कीजिए जिसका पृष्ठीय क्षेत्रफल 154 cm2 है। - Zigya
Advertisement

उस गोले का आयतन ज्ञात कीजिए जिसका पृष्ठीय क्षेत्रफल 154 cmहै।


पृष्ठीय क्षेत्रफल = 154 cm2
therefore           4 πr squared space equals space 154

               4 cross times 22 over 7 cross times straight r squared space equals space 154
                straight r squared space equals space fraction numerator 154 space cross times space 77 over denominator 4 space cross times space 22 end fraction space equals space 49 over 4
straight r space equals space square root of 49 over 4 end root space equals space 7 over 2 cm

अत:   आयतन = 4 over 3 πr cubed space equals space 4 over 3 cross times 22 over 7 cross times open parentheses 7 over 2 close parentheses cubed
                 equals space 4 over 3 cross times 22 over 7 cross times fraction numerator 7 cross times 7 cross times 7 over denominator 2 cross times 2 cross times 2 end fraction
equals space fraction numerator 11 space cross times space 49 over denominator 3 end fraction space equals space 539 over 3
equals space 179 2 over 3 cm cubed

309 Views

Advertisement

पृष्ठीय क्षेत्रफल और आयतन

Hope you found this question and answer to be good. Find many more questions on पृष्ठीय क्षेत्रफल और आयतन with answers for your assignments and practice.

गणित

Browse through more topics from गणित for questions and snapshot.