Higher November 2017 Paper 2 Q9
9 Yesterday it took 5 cleaners \(4\dfrac{1}{2}\) hours to clean all the rooms in a hotel.
There are only 3 cleaners to clean all the rooms in the hotel today.
Each cleaner is paid £8.20 for each hour or part of an hour they work.
How much will each cleaner be paid today? (3)
| Answer | Mark | Notes |
|---|---|---|
| 65.60 | P1 | for start in using inverse proportionality, eg \(5 \times 4.5\ (= 22.5)\) or \(4.5 = \dfrac{k}{5}\) or \(5 \times 4.5 \times 60\ (= 1350)\) or \(\dfrac{5}{3}\) or \(\dfrac{3}{5}\) |
| P1 | for process to find number of hours for each cleaner today, eg \(\dfrac{22.5}{3}\ (= 7.5)\) | |
| A1 | for 65.6(0) (SC B2 for 61.5(0)) |