a ratio between two numbers is 3 : 4 and their l . c . m . is 180 . the first number is
"sol . let the required numbers be 3 x and 4 x . then , their l . c . m . is 12 x . ∴ 12 x = 180 ⇔ x = 15 . hence , the first number is 45 . answer b"
multiply(divide(180, multiply(3, 4)), 3)