The dimensions of a cuboid are in the ratio 5:2:1. It's volume is 1250 cubic meters.Find the total surface area

Given that the length,breadth and height are in the ration 5:2:1
Let us assume the dimensions to be as l=5x b=2x and h=x
lbh=volume
5x*2x*x =1250
10x³ =1250
x³ =125
x=5m
l=5*5=25m
b=5*2=10m
h=5m
surface area of a cuboid : 2(lb+bh+hl)
2(25*10+10*5+25*5)
2(250+50+125)
2(425)=850m²
Surface area of cuboid=850m²

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