Question

please answer the question of the 1 and 2

Answer 1

1... Then make groups of 3 from right.The last 4 digits in this case is 4741 which is between 4096 and 4913 i.e the cubes of 16 and 17.

Then the number of groups made which is 1 in this case decide the range.

Which means answer is between 160 and 170

Then see the last digit,it's 2 which means the unit's digit is 8.

Hence it can't be other than 168!!

2. we know that surface are of cube =6a^2
so 6a^2=150
a^2=25
a=5
volume =a^3
5^3=125m^3

Answer 2

2) S.A of cube =150
6a^2 =150
a^2=150/6
a^2=25
a =5
Side of the cube is 5m
Vol of cube =a^3
5^3=125m^3