Making use of the cube root table, find the cube root of the following (currect to three decimal places):

34.2

=

We know that value of

From cube root table we get,

=

So by unitary method,

∵ For difference (350 – 340 = 10 ) difference in cube root values = 7.047 – 6.980 = 0.067

∴ For difference (342 – 340 = 2) difference in cube root values =

=

We also have,

∴

Thus the required cube root is = 3.246.