External and internal diameter are 42 cm and 35 cm respectively find.
External and internal area and their difference.
Answers
Answer:
External and internal diameter are 42 cm and 35 cm respectively find.
- External and internal area and their difference.
Given : External and internal diameter 42 & 35 cm
बाहरी और भीतरी व्यास 42 सेंटीमीटर एवं 35 सेंटीमीटर है
To Find : External and internal Area and difference
बाहरी एवं भीतरी क्षेत्रफल तथा उनका अंतर
Solution:
बाहरी व्यास = 42 सेंटीमीटर
=> External Diameter = 42 cm
बाहरी त्रिज्या= 42/2 = 21 सेंटीमीटर
=> External Radius = 21 cm
भीतरी त्रिज्या= 35/2 सेंटीमीटर
Internal radius = 35/2 cm
बाहरी क्षेत्रफल = π (21)² = (22/7)21² = 1386 सेंटीमीटर²
External area = 1386 cm²
भीतरी क्षेत्रफल = π (35/2)² = (22/7)(35/2)² = 962.5 सेंटीमीटर²
Internal area = 962.5 cm²
अंतर = 1386 - 962.5 = 423.5 सेंटीमीटर²
Difference in area = 423.5 cm²
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