three cubes each of Edge 10cm are joined to form a cuboid find the following: (1) the surface area of resulting cuboid. (2) the ratio of surface area of resulting cuboid to the sum of the surface areas of 3 cubes.
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11
Answer:
7:6
Step-by-step explanation:
surface surface area of a cuboid is equal to. 2(lb+bh+hl). l=30cm. b=10cm. h=10cm. so. 2(30×10+10×10+10×30). so=2×700=1400. surface area of a cube is equal to 6a×a=6×10×10=600. surface area of three cubes are 1800cm. therefore the ratio of surface area of resulting cuboid to the sum of surface area of 3 cubes is. 1400÷1800=7:6
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10
Step-by-step explanation:
the answer is7:9 OK it is correct
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