Question

The radius of a coin is 1 cm. If four of these coins are placed in a square arrangement on a table so that the rim of each touches that of the other two, find the area of the unoccupied space between them ?

Answer 1

Side of a square formed=4cm

So, area of square formed=4*4sq.cm

Radius of a coin=1cm

therefore, area of a coin=4×22/7×1×1sq.cm

now, according to question

Area of unoccupied space=4×4-4×22/7

=16-12.57

=3.43