Question

Find the volume , lateral surface area and the total surface area of a cube each of whose edges measures: (i) 7 m (iii) 5.6 cm (iii) 8 dm 5 cm

Answer 1

1. volume of cube = a×a×a
=7×7×7
=343
lateral surface area =4×a×a
=4× 7×7
=196
total surface area= 6×a×a
= 6×7×7
=294
2. volume of cube=a×a×a
=5.6×5.6×5.6
= 175.616
lateral surface area=4×a×a
= 4×5.6×5.6
= 125.44
total surface area = 6×5.6×5.6
=188.16
3. volume of cube= 85×85×85
= 614125
lateral surface area= 4×a×a
=4×85×85
=28900
total surface area= 6×a×a
= 6×85×85
=43350

Answer 2

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