Question: Jacob is building ladders. One of his clients needs 10 ladders with 50 rungs, and 20 ladders with 60 rungs. Jacob has to charge $2 for every rung. How much does the client have to pay for the ladders? Think carefully first, then make a decision:
10 ladders with 50 rungs have a total of 10 * 50 = 500 rungs. 20 ladders with 60 rungs have a total of 20 * 60 = 1200 rungs. In total there are 1200 + 500 = 1700 rungs. The client must pay 2 * 1700 = $3400. So the answer is 3400.