Find the Cube Of: 1 2/7 - Mathematics

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Sum

Find the cube of: `1 2/7`

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Solution

`1(2)/(7)`

= `(1 2/7)^3`

= `((1 xx 7 + 2)/7)^3`

= `(9/7)^3`

`= (9 xx 9 xx 9)/(7 xx 7 xx 7) = 729/343 = 2 43/343`

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Chapter 4: Cubes and Cube Roots - Exercise 4 (A) [Page 48]

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Selina Concise Mathematics Class 8 ICSE
Chapter 4 Cubes and Cube Roots
Exercise 4 (A) | Q 4.4 | Page 48
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