Get live Maths 1-on-1 Classs - Class 6 to 12
Ex 11.4, 7 (i) - Chapter 11 Class 8 Mensuration
Last updated at March 23, 2023 by Teachoo
Transcript
Ex 11.4, 7 If each edge of a cube is doubled, (i) how many times will its surface area increase? Let Original Edge of cube = a Given that edge is doubled, ∴ New edge = 2a Surface area of original cube = 6 × (Edge)2 = 6a2 Surface area of new cube = 6 × (Edge)2 = 6 × (2a)2 = 6 × 4a2 = 4 × 6a2 = 4 × Original Surface Area ∴ New surface area will be 4 times original surface area. Surface area of new cube = 6 × (Edge)2 = 6 × (2a)2 = 6 × 4a2 = 4 × 6a2 = 4 × Original Surface Area ∴ New surface area will be 4 times original surface area.
