Given:
for some constant k.
Now, let's rearrange the third equation:
Notice tha from second equation equals 48, so substitute:
The price $p of a steel ball is proportional to the cube of its radius x cm It is known that the price is $48 for a teel ball of certain radius R cm. Find the price of a steel ball of radius R/2 cm . Ans is $6.
Please explain to me how to solve why is it $6