Question

How many coins 1.75 cm in diameter and thickness after 22 mm must be melted to form a cuboid of dimensions 11 cm into 10 cm into 7 cm?

Answer 1

volume of cuboid= n× volume of each coin
11×10×7= 22÷7×175÷200×175÷200×22÷10 n
n= 1600÷11
n=145.4
n= approximately 145