Question

please help me plzz...

Answer 1

As 0.729 bar
0.7292929...... = x
(multiply both sides by 10 )
than, 7.292929... = 10x (eq. 1)
( now again, multiply both sides by 100)
than, 729.292929.... = 1000x (eq.2)
now subtract eq. 1 from 2
729.292929 = 1000x
-7.292929 = 10x
-------------------------------------
722 = 990x
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x. = 722
------
990
now p² - q²
(722)² - (990)²
solve it now
hope it will helpful for you .