Question

Suppose x varies jointly as y and z. If x=50 when y=2 and z=4, how do you find x when y=6 and z=10?

Answer 1

Joint variation means: `x(y,z) = kyz`.

Please see the explanation for the solution.

Explanation:

Given: `x(y,z)=kyz and x(2,4)=50`

`50= k(2)(4)`

`k = 25/4`

`x(6,10) = 25/4(6)(10) = 375 larr` Answer