Try to recall the formula for area of square.

Use the division method to find the square root of this number.

Think of times table in which you will see 9 at the units place.

Think of the number which givesÂ 5 at the end of square and since there are 2 zeros so how many zeros should there in it's square root.

Think of the number which givesÂ 5 at the end of square and since there are 2 zeros so how many zeros should there in it's square root.

Recall how to find perfect square by using ones digit.

Think of a number that multiply by itself to give 9 at units place.

Think of number whose square ends with 5.

Think of the number whose square will give you 3600.

Try to recall the formula for area of square.