The lateral surface area of a cube is 400cm². Its total surface area is
a)600cm² b) 2400cm² c) 500cm² d) 650cm²

Step-by-step explanation:

Lateral surface area of cube = 4a²

4a² = 400

   a² = 400÷4

  a² = 100

 a = √100 = √10*10

a = 10 cm

Total surface area = 6a²

                               = 6 * 10²

                               = 6* 100

                               = 600 cm²

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(0.2)+(-8)=0.3+-3+0.3m is the equation i guess? ?

step-by-step explanation: