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first, you should find the volume of the cuboidal box i.e = (36 x 32 x 25)cm = 28800 cm cube then, find the volume of a cube that is to be made out of the box = (4 x 4 x 4)cm cube = 64 cm cube. no. of cubes = 28800/64 = 450 total surface area of 1 cube = 6 x 4² = 96 cm square total surface area of 450 cubes = 96x 450 = 43200 cm square ii)cost of silver painting these cubes @ 0.75 per cm² = 43200 × 0.75 = 32400 i) cost of silver painting these cubes @ 0.75 per m² = area in m² = 43200/10000 = 4.32m² cost = 0.75 × 4.32 = 3.24

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.

length of box = 36 cm breadth of box = 32 cm height f box = 0.25m = 25 cm

A) vol of cuboidal box = ( 36 x 32 x 25 ) Cm³ vol. of cube = (4 x 4 x 4 ) cm³

no. of cubes that can be made = 36x32x25/4x4x4 = 450 cubes B) i> T.S.A. of cube in cm of 1 cube=6( side ) ² = 6(4)² = 6 x 16 = 96 cm²

cost of painting for 1 cube= Rs (0.75 x 96) = Rs 72

cost for painting for 450 cubes = Rs (450 x 72 ) = Rs 32400

ii> side of cube in m = 0.04 m

T.S.A. of cube in m for 1 cube = 6 ( 0.04 )² = 6 x 0.0016 = 0.0096 m² cost of painting for 1 cube = Rs ( 0.75 x 0.0096) = Rs 0.0072

cost of painting for 450 cubes = Rs ( 450 x 0.0072 ) = Rs 3.24