year 8 maths

170 Chapter 3 Measurement and Pythagoras’ theorem
8 What is the time difference between these time periods?
a 10:30 a.m. and 1:20 p.m. b 9:10 a.m. and 3:30 p.m.
c 2:37 p.m. and 5:21 p.m. d 10:42 p.m. and 7:32 a.m.
e 1451 and 2310 hours f 1940 and 0629 hours
Example 22a
Example 22b
9 Use the time zone map on pages 166–7 to find the time in the following places, when it is
10 a.m. UTC.
a Spain b Turkey
c Tasmania d Darwin
e Argentina f Peru
g Alaska
h Portugal
10 Use the time zone map on pages 166–7 to find the time in these places, when it is 3:30 p.m.
in Victoria.
a United Kingdom b Libya
c Sweden d Perth
e Japan f central Greenland
g Alice Springs
h New Zealand
11 What is the time difference between these pairs of places?
a United Kingdom and Kazakhstan
b South Australia and New Zealand
c Queensland and Egypt
d Peru and Angola (in Africa)
e Mexico and Germany
PROBLEM-SOLVING AND REASONING
12–14, 22 14–17, 22–23
17–21, 23–25
12 A scientist argues that dinosaurs died out 52 million years ago, whereas another says they died out
108 million years ago. What is the difference in their time estimates?
13 T h ree essays are marked by a teacher. The first takes 4 minutes and 32 seconds to mark, the second
takes 7 minutes and 19 seconds, and the third takes 5 minutes and 37 seconds. What is the total
time taken to complete marking the essays?
14 Adrian arrives at school at 8:09 a.m. and leaves at 3:37 p.m. How many hours and minutes is
Adrian at school?
15 On a flight to Europe, Janelle spends 8 hours and 36 minutes on a flight from Melbourne to Kuala
Lumpur, Malaysia, 2 hours and 20 minutes at the airport at Kuala Lumpur, and then 12 hours and
19 minutes on a flight to Geneva, Switzerland. What is Janelle’s total travel time?
16 A phone plan charges 11 cents per 30 seconds. The 11 cents are added to the bill at the beginning
of every 30 -second block of time.
a What is the cost of a 70 -second call?
b What is the cost of a call that lasts 6 minutes and 20 seconds?
Cambridge Maths NSW
Stage 4 Year 8 Second edition
ISBN 978-1-108-46627-1 © Palmer et al. 2018
Cambridge University Press
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