Question

Y varies jointly as x and z, and y = 32 m, x = 6 m, and z = 8 m. what is the value of y when x = 5 m and z = 12 m?

a. 90 m
b. 4 m
c. 40 m
d. 9 m

Answer 1

as x = 5 & z=12,

2/3 = y /(xz) = y/(5*12)

= y/60

so y / 60 = 2/3

y = (2*60)/3

= 40