Answer:
Volume of Box / volume of tin = number of tins required
Volume of box =50*40*20= 40000 cu.cm
Volume of Tin = pi*r^2*h=pi*4^2*15 = 754 cu.cm
4000/754= 53 tins (rounded off)
Step-by-step explanation: i'm sorry if this is a bit complicated but i hope it answers your question. Take care.