Question 28The weight Wkg of metal bar varies jointly as its length L metres and the square of its diameter d meters. If W = 140, when d = 42⁄3 and L = 54, find d in terms of W and LA.√(42W⁄5L)B.√(5L⁄42W)C.42W⁄5LD.5L⁄42WObjective Show full explanation