Question
Dylan used 3 elastic bands to form the sides of triangle PQR where PQ = 9 cm, QR = k cm and PR = 3k cm. Julian stretches two of the elastic bands and enlarges triangle PQR. The sides QR and PR are stretched to 2 times its original length. What is the perimeter of the stretched triangle PQR?
2 m

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Dylan used 3 elastic bands to form the sides of triangle PQR where PQ = 9 cm, QR = k cm and PR = 3k cm. Julian stretches two of the elastic bands and enlarges triangle PQR. The sides QR and PR are stretched to 2 times its original length. What is the perimeter of the stretched triangle PQR?