three cubes each of side 7 cm are joined end to end find the surface area of the resulting figure
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l= 21 cm
b= 7 cm
h= 7 cm
use ,
surface area of cuboid = 2(lb+bh+hl)
= 2( 21×7 + 7×7 + 7×21)
= 2(147+49+ 147)
= 2( 343)
= 686 cm^2
b= 7 cm
h= 7 cm
use ,
surface area of cuboid = 2(lb+bh+hl)
= 2( 21×7 + 7×7 + 7×21)
= 2(147+49+ 147)
= 2( 343)
= 686 cm^2
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