SOLUTION: John is stacking boxes directly upon each other. He stacks at 1 box per minute initially and every minute after that, his stacking rate increases by 1 box per minute. If each box i

Question 1143586: John is stacking boxes directly upon each other. He stacks at 1 box per minute initially and every minute after that, his stacking rate increases by 1 box per minute. If each box is 5 inches tall , in how many minutes will the stack be 30 inches tall?
Answer by ikleyn(52790) (Show Source): You can put this solution on YOUR website!
.


1*5 + 2*5 + 3*5 = 30 inches.


ANSWER.  In 3 minutes.

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