Answer :
if y varies jointly with x & z
then y = kxz k = constant > you need to find the constant
first before you can solve this kind of problem
60 = k3*4 y = 60 when x is 3 & z is 4
12k = 60
k = 5
Thus y = 5*6*8 when x =6 & z =8
y = 240
then y = kxz k = constant > you need to find the constant
first before you can solve this kind of problem
60 = k3*4 y = 60 when x is 3 & z is 4
12k = 60
k = 5
Thus y = 5*6*8 when x =6 & z =8
y = 240