Question

identical trees of light enters three blocks composed of different materials. Light slows down upon entering the block. Rank the blocks according to the speed light travel in age from highest to lowest speed.

Please help me please..

I want the full answer please as its important.

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Answer 1

Explanation:

Perimter=sum of all lengths of sides of triangle

⇒ Perimeter =3a {a= side of triangle }

⇒45=3a

⇒a=15cm.