Question:The surface area of a cube is `600 cm^2`. The length of its diagonal is : 

A `10/√3 cm` 
B `10/√2 cm` 
C `10√3 cm` 
D `10√2 cm` 

+ Answer
A 

+ Explanation
`6a^2 = 600 ⇒ a^2 = 100`

`or a = 10 cm`.

`:. Diagonal = √3 a = 10√3 cm`.

+ Report

Irin Moni

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