Question
David used 3 stretchable bands to form the sides of triangle HJK where HJ = 10 cm, JK = m cm and HK = 4m cm. Tim stretches two of the elastic bands and enlarges triangle HJK. The sides JK and HK are stretched to 3 times its original length. What is the perimeter of the stretched triangle HJK?
2 m

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David used 3 stretchable bands to form the sides of triangle HJK where HJ = 10 cm, JK = m cm and HK = 4m cm. Tim stretches two of the elastic bands and enlarges triangle HJK. The sides JK and HK are stretched to 3 times its original length. What is the perimeter of the stretched triangle HJK?