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4. What is the surface area of a cube whose length is 5.3 dm?
5.What is the surface area of a rectangular solid that is 9.2 cm by 7.5 cm
4. What is the surface area of a cube whose length is 5.3 dm?
5.What is the surface area of a rectangular solid that is 9.2 cm by 7.5 cm
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Answer:
4.
SA = 6a²
= 6 (5.3)²
= 6 (28.09)
SA = 168.54dm²
5.
SA = 2(wl+hl+hw)
= 2((2.7×9.2)+(7.5×9.2)+(7.5×2.7))
= 228.18cm²
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