13. The surface area of a cube is 1536 cm2Find: (i) the length of its

1.	13. The surface area of a cube is 1536 cm2Find: (i) the length of its edge(ii) its volume(iii) the volume of its material whose thickness is 5 mm.
Answer» Let edge length is 'a', so as per given data6 a^{2}=1536cm ^{2}=> a= 16cm volume = a^{3}=4096 cm^{3} convert mm to cm i.e 5mm = 0.5cmvolume of the material used= 6x 1536x0.5cm=4608 cm^{3}

13. The surface area of a cube is 1536 cm2Find: (i) the length of its edge(ii) its volume(iii) the volume of its material whose thickness is 5 mm.

Answer»

Let edge length is 'a', so as per given data6 a^{2}=1536cm ^{2}=> a= 16cm

volume = a^{3}=4096 cm^{3}

convert mm to cm i.e 5mm = 0.5cmvolume of the material used= 6x 1536x0.5cm=4608 cm^{3}