Four cubes , each of edge 9 cm ,are joined . Write the dimensions of the cubiod obtained. Also ,find total surface area and volume .
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Step-by-step explanation:
edge (a)of each cube = 9cm
volume of the cube = a3
=729cm3
volume of cuboid =sum of v of 4cubes =729+729+729+729
volume of cube =2916 cm3
height of the cuboid =9cm
length of the cuboid =36cm
breadth of the cuboid =9cm
volume of the cuboid=lbh
= 36*9*9
volume of the cuboid=2916 cm3
total surface area of cuboid =2(lb+bh+hl) =2(36*9+9*9+9*36) =2(324+81+324)
=2*729
total surface area of cuboid =1458cm2
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