The surface area of a cuboid 1300 cm√ length 15 CM, width 10 cm what is height?
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let hight=x. 1300=2(lb+bh+hl)
1300=2(15×10+10×x+15×x)
1300=2(150+10x+15x)
1300=300+20x+30x
1300-300=50x
1000=50x
x=1000÷50
x=20 is the answer
1300=2(15×10+10×x+15×x)
1300=2(150+10x+15x)
1300=300+20x+30x
1300-300=50x
1000=50x
x=1000÷50
x=20 is the answer
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