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21. Three numbers are in the ratio 2 : 3:4. The sum oftheir cubes is 72171. Find the numbers. |
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Answer» Let the three numbers be 2X,3x,4x Sum of their cubes=72171 (2x)^3+(3x)^3+(4x)^3=72171 8x+27x+64x=72171 99x=72171 x=72171÷99 x=729. 2x=2×729=1458 3x=3×729=2187 4x=4×729=2916 |
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