Class 10 maths standard 30/4)3 question pls soove it

As it is given h is the perpendicular depth of the lid so it makes CDAB
As OC is also a straight line thus CDAB.
The perpendicular line from the centre of the circle bisects the chord.
Here, AB is a chord and OC is perpendicular to AB.
So, D bisects the chord AB.
Here, h=CD=2BD=AB2=6In BDO, we haveOB2=BD2+OD2r2=62+r-22r2-r-22=3622r-2=36r=10 cm

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