4. A A PQR right angled at Q has PQ = 8 cm and
OR = 15 cm. It is enlarged to a triangle P'Q'R' such
that the image of P is P', image of Q is Q', image of
Ris R' and length of P'R' = 42.5 cm. Find :
(i) the scale (enlargement factor);
(ii) the lengths of P'Q' and 'R';
(iii) the area of A PQR and hence area of image
triangle P'O'R'.
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