In triangle PQRPQRPQR, the side length QR=25 cmQR = 25\text{ cm}QR=25 cm and PQ=14 cmPQ = 14\text{ cm}PQ=14 cm. The angle QPR=60∘QPR = 60^\circQPR=60∘.
Work out the size of angle PRQPRQPRQ, labeled xxx. Give your answer to 3 significant figures.
