Higher November 2021 Paper 3 Q9
9 On Monday, 12 people took 5 hours to clean a number of cars.
On Tuesday, 15 people cleaned the same number of cars.
Assuming that all the people worked at the same rate,
(a) work out how many hours the 15 people took to clean the cars. (2)
The assumption is wrong.
(b) How might this affect the time taken for the 15 people to clean the cars? (1)
| Answer | Mark | Mark scheme |
|---|---|---|
| 4 | P1 | \(12 \times 5 \div 15\) |
| A1 | cao |
| Answer | Mark | Mark scheme |
|---|---|---|
| Statement | C1 | Acceptable examples it could take more time it could take less time it could take more or less time it would take longer if they worked at a slower rate Not acceptable examples the time will be less as there are more people if the rate at which the 15 people work changes it would have taken longer it would take less time |