Text books are stored on two shelves. Each shelf is 0.72m long. Each textbook is 30 millimetres wide. Could 50 textbooks be stored on these shelves? (3 marks)

None caluclator paper, so you know that the divisions/multiplications will be relatively simple. First thing to do is convert both measurements we have into the same units (in this case millimetres). We should know that units go metres, cm's (1/100th of a metre), mm's (1/1000th of a metre). Therefore to change 0.72 metres into millimetres we simply have to multiply 0.72 by 1000. This equals 720. Now we have both measurement in the same units it becomes a simple division. If each textbook is 30 millimetres wide then we simply divide the shelf length (720 millimetres) by idividual book width (30 millimetrs) to get the number of books that can fit on the shelf. As predicted this is a simple division and equals 24 (Mark 1). The final thing not to forget is that the question tells us we have TWO sheleves. Therefore we multiply 24 by 2 which gives us 48 books (Mark 2). This is less than the 50 the question asks, therefore the answer is NO. (Mark 3). 3/3 marks