The lengths of the three sides of a triangle are in the ratio of 2 : 2 : 3. If the perimeter of the triangle is 42 cm, then what is the length of the largest side?
Answer & explanation
Correct answer: option 2
Let the sides be 2a, 2a, and 3a
2a + 2a + 3a = 42
= 7a = 42
= a = 6
So, the length of the largest side = 6 × 3 = 18 cm