Question

Thickness of twenty 5 rupee coins is 12cm.Find the thickness off a single 5 rupee coin.​

Answer 1

2.916 mm is the thickness of 5 Rs coin.

Explanation:

We know in one dozen coins, there are twelve 5 Rs coin.

                                 ⇒ 1 dozen coins = 12 coins

 Given that twelve, 5 Rs coins together form a height of 3 cm 5mm. ( given in the question)

It means, height of twelve coins put together one above another (pile), the total height reached is three centimetre three milimetre.          

                                ⇒  H of twelve 5 Rs coins = 3cm 5mm = 35 mm

                               So, height of one 5 Rs coin =

                                 ⇒   H of one 5 Rs coin = 2.916

Answer 2

Thickness of twenty 5 rupee coins=12 cm
So,
Thickness of one 5 rupee coin=12/20=0.6 cm