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If perimeter of a triangle is 100 cm and the length of two sides are 30 cm and 40 cm, the length of third side will be:

A70 cm

B30 cm

C60 cm

D50 cm

Answer:

B. 30 cm

Read Explanation:

Perimeter of triangle = sum of all its sides P = 30+40+x 100=70+x x=30 cm


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