1.

In Fig, on a circle of radius 7 cm, tangent PT is drawn from a point P such that PT = 24 cm. If O is the centre of the circle, then the length of PR is(a) 30 cm (b) 28 cm (c) 32 cm (d) 25 cm

Answer»

The correct option is (c) 32 cm.

In ΔPOT, 

(OP)2 = (OT)2 + (PT)2

OP2 = (7)2 + (24)2

OP2 = (25)2 

OP = 25 cm 

PR = OP + OR 

= 25 + 7 

= 32 cm



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