Question
Owen used 3 elastic bands to form the sides of triangle RST where RS = 10 cm, ST = k cm and RT = 2k cm. Tom stretches two of the elastic bands and enlarges triangle RST. The sides ST and RT are stretched to 2 times its original length. What is the perimeter of the stretched triangle RST?
2 m

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Owen used 3 elastic bands to form the sides of triangle RST where RS = 10 cm, ST = k cm and RT = 2k cm. Tom stretches two of the elastic bands and enlarges triangle RST. The sides ST and RT are stretched to 2 times its original length. What is the perimeter of the stretched triangle RST?