Magnitude of magnetic field (in SI units at the center of a hexagonal shape coil of side 10 cm, 50 turns and carrying current I (Ampere) in units of μ0Iπ is :

Magnetic field due to one side at center is B=μ0i4πrsinα+sinβ​=μ0i4π3a2sin30º+sin30º  =μ0i2π3a​There are 6 sides and 50 turns          ​B=6×50×μ0i2π30.1=5003μ0iπ