Cinemugam (Kollywood): Construct ∆ PQR, in which QR = 4.2 cm, m ∠Q = 400 and PQ + PR = 8.5 cm.

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Construct ∆ PQR, in which QR = 4.2 cm, m ∠Q = 40⁰and PQ + PR = 8.5 cm.