Question

20 coins are placed one on top of one another to form a tower of length 4 cm. What is the thickness of 1 coin in mm.

Answer 1

Answer:

2 mm

Explanation:

Number of coins= 20

length of the coin tower = 4 cm

thickness of 1 coin (in cm) = length of coin tower/number of coin

thickness of 1 coin(in cm)= 4/20 cm

⇒ 1/5 cm

Now , length of 1 coin in mm

1 cm=10 mm

⇒1/5 * 10

⇒ 2 mm