Cube 5

The surface of the cube is 15.36 dm2. How will this cube's surface area change if the edges' length is reduced by 2 cm?

Final Answer:

ΔS =  -3.6 dm2

Step-by-step explanation:

S1=15.36 dm2 Δa=2 cm dm=2:10  dm=0.2 dm S1=6a12 a1=S1/6=15.36/6=58=1.6 dm  a2=a1Δa=1.60.2=57=1.4 dm S2=6 a22=6 1.42=25294=11.76 dm2  ΔS=S2S1=11.7615.36=3.6 dm2



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