Question

When the size of a spherical nanoparticle decreases from 30 nm to 10nm, the ratio surface area/volume becomes

(A) 1/3 of the original

(B) 3 times the original

(C) 1/9 of the original

(D) 9 times the original

Answer 1

Correct Option :- (B) 3 times the original

Explanation :-