Question

Its given that x varies directly with y square and x=3 and y=3.Find the value of x when y=45

Answer 1

Explanation:

x = ky², where k is a real constant.

When x = 3, y = 3.

=> 3 = 9k, k = 1/3.

Therefore x = y²/3.

When y = 45, x = 45²/3 = 675.