The dimensions of a cuboid are in ratio 5:2:1. It’s volume is 1250 cubic metres. What is its total surface area.
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volume of cuboid=l*b*h
1250=5x*2x*x
1250=10x^3
x^3=1250/10
x^3=125
x=5m
l=5*5=25m
b=2*5=10m
h=1*5=5m
total surfacd area of cuboid=2(lb+bh+hl)
=2(25*10+10*5+5*25)
=2(250+50+125)
=2(425)
=850 cubic metre
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