Area and Perimeter practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
A circular pizza has a radius of 21 cm. If 75% of it is eaten, what is the area of the pizza remaining?
Correct Answerसही उत्तर
B. 346.5 cm²B. 346.5 सेमी²
Explanationव्याख्या
Percentage of pizza remaining:
4 of the total pizza Area of a circle:
4 × π × r² Using π = 22
7 and r = 21 cm: = 1
4 × 22
7 × 21 × 21 = 1
4 × 1386 = 346.5 cm² Hence, the correct answer is 346.5 cm².
बचे हुए पिज्जा का प्रतिशत: = 100% − 75% = 25% = 1
वृत्त का क्षेत्रफल: = πr² Therefore, remaining area:
अतः शेष क्षेत्रफल: = 1
अतः सही उत्तर 346.5 सेमी² है।
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