A wall is 4 m high and 40 cm wide. It contains two windows of din 2.5 m X 1 m and a gate way of dimensions 2 m x 3 m. If 2450 cubical slab
length 20 cm are required to construct the wall, find the length of the wall​

Main idea on left, details on right

The right answers for the question are

1.   an exact solution requires a radical solution - no decimal approximation.2. (a)4x^3 = 756x^3 = 756/4 = 189x =   cube root of 189 =   5.74   to nearest hundredth answer(b)   189 = 3*3*3*7   so we can write the cube root of 189 as 3∛7 answerchecking (a) 4*(5.74^3 =   756.48   which is very close(b)   4* ((3∛3)^3   = 4*189   = 756   - spot on! 3. i would use solution b because the original question asked for an exact solution.