A roll of card has an area of 43 m^2. A postcard has an area of 125 cm^2. How many post cards can be cut from the roll, assuming there is no wastage? (calculator question)

This question is assessing your knowledge of units and their conversion. Notice that the area units of the roll of card and the postcard are different, so it is important that before we carry out any calculations that we convert them to the same units. We will be converting the 43m² into cm².To convert from m to cm you must multiply the measurement by a factor of 100and so to convert from m² to cm² you will multiply the 43m² by a factor of (100)² Working out: 43x(100)²= 43 x 10000= 430000 cm²Now that we have the area of the roll of card and the postcard both in cm² we can divide the are of the roll of card by that of the postcard to work out how many postcards you will make (assuming no card is left over). Working out:Number of cards= 430000 /125 =3440 postcards