Question

Two cubes of volume 125 cm 3 are joined end to end to form a cuboid. The surface area of the resulting cuboid is

Answer 1

Volume of cube=125 cm³
Volume of cube= (side)³
125=(side)³
∛125=side
5 cm= side

When 2 cubes are joined,
Length of cuboid=5+5=10 cm
Breadth of cuboid=5 cm
Height of cuboid=5 cm

Surface area of cuboid= 2(lb+bh+hl)
              "                   =2[(10x5)+(5x5)+(10x5)]
                                   =2[50+25+50]
                                   =2x125
                                   250 cm²
                                   

Answer 2

let side of cube be a
a CUBE=125
a=5
TSA of cuboid=2(5 *a sq)
                 =10*25=250cmsq