Math Problem of the Week - Upper Elementary - Aug. 15, 2021 to Aug. 21, 2021

Upper Elementary: 

Question: Grace is buying a new charger for her phone and wants to know which one has the longer cord: a black charger with a 70-inch cord or a white charger with a 180-centimeter cord. An inch is 2.54 centimeters. Which cord is longer? By how much? Give your answer in centimeters.

Answer: The white cord is 2.2 centimeters longer.

Solution: Since an inch is 2.54 centimeters, that means that 70 inches is 70 x 2.54 = 177.80 centimeters. The white cord is 180 centimeters long, which is 180-177.80 = 2.2 centimeters longer.