(a) One morning, Lizzy went on a bus journey. The clock shows the time that she left home.
(i) Write down this time using the 12-hour clock.
Lizzy got home at ten to four in the afternoon.
(ii) Write down this time using the 24-hour clock.
(2)
(b) On another day, Lizzy drove by car to visit her aunt. She left home at 9 30 am. Lizzy arrived at her aunt’s house at 11 15 am. She drove a distance of 140 km. Work out, in km/h, Lizzy’s average speed for the journey. (3)
Mark scheme (a)
Scheme
Marks
(i) 10:15 am
B1
(ii) 15:50
B1
(2)
Mark scheme (b)
Scheme
Marks
1.75 or \(1\dfrac{3}{4}\) or 105
M1
140 ÷ “1.75” or \(\dfrac{140}{\text{“105”}} \times 60\)
M1
80
A1
(3)
Notes
M1: for correctly converting “1hr 45 mins” into a decimal or fraction or minutes (eg. 1.75h or 105 min)
M1: independent but “1.75” or “105” must be correct for their duration accept 140 ÷ 1.45
