Question

You have two spheres. Sphere a has radius ra and sphere b has radius rb = kra. What is b's volumevb intermsofva andk? Vb = va

Answer 1

`V_a=(4)/(3)\pi r_a^3\\\\V_b=(4)/(3)\pi r_b^3\\\\V_b=(4)/(3)\pi(kr_a)^3\qquad\text{substitute for $r_b$}\\\\V_b=k^3V_a`