The total length of all the edges of a cube of side 15 cm is 

Correct Answer - (a) 9.5 सेमी: `" "`(b) 6.5 सेमी:

Given: L = 40 cm = 0.4 m, F = 2000 N = 2 × 103N l = 0.5 cm = 0.005 m, A = L2 = 0.16 m2 To find: Modulus of rigidity...

Correct option is: (D) 0.002

P=force/Area.              P=16N/64×10-⁴ P=16N×10⁴/64m² P=2500 Pascal

Correct option is (B) 9 cm Let the side of cube be a. \(\therefore\) \(a^3=729=9^3\)   \((\because\) Volume of cube \(=a^3)\) \(\Rightarrow\) a = 9 cm Hence, side of cube is 9 cm.

(i) false (ii) true (iii) true

Let the number is = a  Cube of number will be = a3  Now, the number is trebled = 3 × a = 3a  Cube of new number = (3a)3 = 27a3  Hence, new...

Correct Answer - B Volume of new cube formed `= (3^(3) + 4^(3) + 5^(3)) cm^(3)` `= (27 + 64 + 125) cm^(3) = 216 cm^(3)` Let `a^(3) = 216 =...

Correct Answer - C Volume of big cube = Sum of the volumes of smaller cubes.