Question

The question four below answer

Answer 1

Answer:

Given that x varies directly as 2y that is

x α 2y ----------- [ means x is directly proportional to 2y ]

⇒ x= k(2y) [ where k is a constant ]

⇒ x = 2ky ...(1)

when x = 4 and y = 18

so 4 = 18k

⇒ k = 9/2

Substitute the value of k in (1), we get

So x = 2(9/2)y

⇒ x = 9y

Now when y = 36 then

x = 36*9 = 324 (Ans.)

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