In the framework of an n-period binomial model with parameters u, d, and r satisfying 0 < d < 1 r < u, consider the european asian call option which expires at n and pays.

Volume is length times width times height so
20 times 8 times 30 which is 4,800
surface area is ph (p is perimeter of base), h is height.
so perimeter would be length+length+width+width so 20+20+8+8 which is 56. so multiply 56 times 30 which is 1680. hope this !