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Please explain process Stack 210 cans where each layer has one more than the one before Since Terry has to start with the bottom how many cans should be in the bottom row so a pyramid would work out?
Wiki User
∙ 14y ago
210=(1+An)(n)/2
Need to solve for An
An=A1+d(n-1)
An=1+1(n-1)
An=1+1n-1
An=n
210=(1+n)(n)/2
n^2+n=420
n^2+n-420=0
n=20
Wiki User
∙ 14y ago
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