Question

Find the tens digit of the cube root of the following numbers:​
​(iii) $571787$

Answer 1

Step: Find the tens digit of cube root​

Unit digit of $571787$ is $7$
$\therefore$ Unit digit of its cube root is $3$.
Now,
The number obtained by striking out units, tens, and hundreds digit is $571$
$8^3<571<9^3$

$\therefore$ The tens digit of the cube root of $571787$ is $8$.