Question

A solid cubical bock of fine wood costs RS 256 at RS 500 per metre square. Find its volume and the length of each side.

Answer 1

let the sides be of length be a 

so 1 m² = Rs 500

so Rs 1 = 1/500 m²

so Rs 256 = 256/500 m² = 0.512 m²


 so a² = 0.512 m² ⇒ a = 1.6√0.2 m

so volume = (1.6√0.2)³ = 0.366 m³