Question : The perimeter of an isosceles triangle is 91 cm. If one of the equal sides measures 28 cm, then what is the value of the other non-equal side?
Option 1: 56 cm
Option 2: 14 cm
Option 3: 42 cm
Option 4: 35 cm
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Correct Answer: 35 cm
Solution :
Given,
Perimeter = 91 cm
Length of two equal sides = 28 cm
Let the length of the non-equal side be $x$ cm.
Perimeter = Sum of all sides
⇒ $91=28+28+x$
⇒ $91=56+x$
⇒ $x=91-56$
⇒ $x=35$
Hence, the correct answer is 35 cm.
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