1 .	If the circumference of a circle increases from 4 π to 8 π , what change occurs in its area ?
[ A ]    It doubles [ B ]    It triples [ C ]    It quadruples [ D ]    It is halved
Answer : Option C Explanation : If circumference of circle increase from 4 π to 8 π means doubles then radius will also del udes as a resul t area wil l quadruples
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