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1). 2 : 5 : 32). 3 : 5 : 23). 1 : 5 : 64). 7 : 4 : 6 |
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Answer» The DENSITY of Iron is twice that of Copper and four times that of Silver. Suppose density of Silver be D. ⇒ Density of Iron will be 4D, and that of Copper will be 2D. Let the volumes of Iron, Copper and Silver taken be P, Q and R, respectively. Weight = Volume × Density ⇒ Weights of Iron, Copper and Silver will be 4PD, 2QD and RD, respectively. ⇒ 4PD : 2QD : RD = 2 : 5 : 3 ⇒ 4P : 2Q : R = 2 : 5 : 3 ⇒ 4P : 4Q : 4R = 2 : 10 : 12 ∴ Ratio of volumes should be 1 : 5 : 6. |
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