Question

if p varies inversely as r and p=20 when r=12,find r when p=80

Answer 1

Answer:

3

Step-by-step explanation:

p=20, r=12

p=80,r=Z (say)

20×12=80×Z (multiplication because inversely proportional, division is used when two variables are directly proportional)

240=80×Z

Z=240/80

Z=24/8=3

Z= r= 3