If a circular paper disc is trimmed in such a way that its circumference is reduced in the ratio 2:5, In what ratio is the surface area reduced?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
Correct Answer: Option D
Explanation:
If the circumference of the circular Fig. paper disc is reduced in the ratio 2 : 5, then the surface area must be reduced by ratio 22 : 52
= 4 : 25
If the circumference of the circular Fig. paper disc is reduced in the ratio 2 : 5, then the surface area must be reduced by ratio 22 : 52
= 4 : 25