Answer:
Step-by-step explanation:
If p varies jointly as m and r, then;
p = kmr
k is the proportionality constant
Given that p = 180, m = 5 and r = 8
180 = k(5)(8)
180 = 40k
k = 180/40
k = 4.5
To get m when p = 324 and r = 6
324 = 4.5(m)(6)
324 = 27m
m = 324/27
m = 12
Hence the value of m is 12
