Question

find the volume and total surface area of rectangular solid(cuboid) measuring 1m by 80cm by 0.75 m​

Answer 1

Answer:

l=1m=100cm

b=80cm

h=0.75m=75cm

volume =lbh

=100×80×75

=6000000 cm³

total surface area =2(lb+bh+hl)

=2(100×80+80×75+75×100)

=2(8000+6000+7500)

=2(21500)

=43000

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Answer 2

The total surface area of cuboid= 2(lb+bh+hl)

l = 1m , b= 0.8m h = 0.75m

[ 2(1*0.8 + 0.8*0.75 + 0.75*1) ]

[ 2( 0.8 + 0.6 + 0.75 ) ]

[ 2 ( 2.15 ) ]

[ 2 * 2.15 ]

=• 4.3 meter square.

volume of cuboid = lbh

0.8*1*0.75 = 0.6 metre cube.