SSC MTS & Havaldar 2016 · Question 132 of 162

If the ratio of edges of two cubes is 4 : 9, then what is the ratio of the

A64 : 729Correct
B16 : 81
C4 : 9
D2 : 3 60. The marked price of a chair is Rs. 900 and a discount of 10% is given. What (+1, -0.25) is the selling price (in Rs)? a. 810 b. 890 c. 900 d. 870

Answer: A. 64 : 729

Explanation

Given: The ratio of edges of two cubes is 4 : 9 Formula used: Volume of cube = a 3 where a → side of cube Calculation: Let the edges of two cubes be 4x and 9x Volume of 1 st cube = (4x) 3= 64x 3 Volume of 2 nd cube = (9x) 3= 729x 3 Ratio of volume of two cubes = Volume of 1st cube/Volume of 2 nd cube ⇒ 64x 3/ 729x 3 ∴ Ratio of volume of two cubes = 64 : 729

Source: SSC MTS 2016 re-exam (held 10-Oct-2017 Shift 1) paper with key+explanations, via prepp.in · reliable-secondary

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