Question
Ben used 3 stretchable bands to form the sides of triangle QRS where QR = 10 cm, RS = z cm and QS = 4z cm. Sean stretches two of the elastic bands and enlarges triangle QRS. The sides RS and QS are stretched to 4 times its original length. What is the perimeter of the stretched triangle QRS?
2 m

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Ben used 3 stretchable bands to form the sides of triangle QRS where QR = 10 cm, RS = z cm and QS = 4z cm. Sean stretches two of the elastic bands and enlarges triangle QRS. The sides RS and QS are stretched to 4 times its original length. What is the perimeter of the stretched triangle QRS?