Foundation November 2018 Paper 1 Q24
24 A plane travels at a speed of 213 miles per hour.
(a) Work out an estimate for the number of seconds the plane takes to travel 1 mile. (3)
(b) Is your answer to part (a) an underestimate or an overestimate?
Give a reason for your answer. (1)
Give a reason for your answer. (1)
| Answer | Mark | Mark scheme |
|---|---|---|
| 16 to 20 | P1 | for using \(\text{time} = \dfrac{\text{distance}}{\text{speed}}\), eg \(\dfrac{1}{200}\) or \(\dfrac{1}{213}\) or for 1 hour \(= 60 \times 60\ (= 3600)\) seconds |
| P1 | complete process, eg \(\dfrac{1}{200} \times 60 \times 60\) oe or \(\dfrac{1}{213} \times 60 \times 60\) | |
| A1 | for answer in range 16 to 20 |
Additional guidance
Calculation could be done in stages.
| Answer | Mark | Mark scheme |
|---|---|---|
| decision with reason | C1 | (dep on correct use of \(\text{time} = \dfrac{\text{distance}}{\text{speed}}\)) for reason related to their response to part(a), eg overestimate as speed rounded down |