4. If 2x = 3y = 10, then 12xy =
(A) 1,200
(B) 200
(C) 120
(D) 40
(E) 20
Answer: B
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Solution:
ReplyDelete2x = 10 then x = 5
3y = 10 then y = 10/3
so 12xy = 12 * 5 * 10 / 3 = 200
No need to find out value of x and y.
ReplyDelete2x * 3y * 2 = 10 * 10 * 2 = 200