"Numbering system adopted by the International Union of Pure and Applied Chemistry (IUPAC). Encyclopaedia Britannica, Inc.
Q4. If 12 workers can build a wall in 50 hours, how many workers will be required to do the same work in
40 hours? (2 marks)
Q5. A car travels 432 kilometres on 48 litres of petrol. How far would it travel on 20 litres of petrol?(2
marks)