The radius of a circle is 20 cm. If the radius of this circle is decreased to 10 cm, then by what percentage will the area of the circle decrease?

The radius of a circle is 20 cm. If the radius of this circle is decreased to 10 cm, then by what percentage will the area of the circle decrease?
QuestionThe radius of a circle is 20 cm. If the radius of this circle is decreased to 10 cm, then by what percentage will the area of the circle decrease?
Typemultiple_choice
Option60%incorrect
Option75%correct
Option35%incorrect
Option50%incorrect

Solution : percentage ratio =

Required percentage =

ssc reasoning
GkSeries Editor:
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