Sail E0 Webinar
Question

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?

Options:
A .  2 : 1
B .  3 : 2
C .  25 : 18
D .  27 : 20
E .  None of these
Answer: Option C
 -    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

Was this answer helpful ?
Next Question

Submit Solution

Your email address will not be published. Required fields are marked *

More Questions on This Topic :


Latest Videos

Latest Test Papers