Volume and Surface Area

Q1: A large cube is formed from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube?

A 2 : 1

B 3 : 2

C 25 : 18

D 27 : 20

ANS:C - 25 : 18

Volume of the large cube = (33 + 43 + 53) = 216 cm3. Let the edge of the large cube be a. So, a3 = 216          a = 6 cm.

 Required ratio = 6 x (32 + 42 + 52) = 50 = 25 : 18.
6 x 62 36



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.