Chapter 13 Volume of prisms

2.
Convert from
Convert to
10 m/s 36 km/h
120 km/h 33.33 m/s
30 m/min 0.5 m/s
100 cm/min 60 m/h
3. It should have been ______ 3 600 s not _____ 360 s
1 h 1 h .
The correct answer is 36 km/h.
4. 22.22 m/s 5. 9 km/h 6. 126 km/h
7. 10.5 km/h
2.92 m/s
8. 120 km/h
Activity 14.3
1. 1 h 2. 2 h
3. 16:00 4. 6 h
5. 10:00 and 11:00. The graph is the steepest between
these two times.
6. A mark made at 14:30.
Exercise 14.4
1. (a) 08:20 (b) 20 min (c) 0.1 km/min
(d) Faster (e) 08:50
2. (a) 3 km (b) 1__
2 h
(c) Perhaps her friend was not home.
(d) 1 h
(e) 2.67 km/h (rounded to 2 d.p.)
3. (a) 140 m (b) 06:03 (c) 80 s
(d) 2 m/s (e) 0.78 m/s
4. (a) Team Silver Stars (b) 250 km
(c) Team Hot Shots (d) 3 h
(e) 150 km
(f) 100 km/h
5. (a) 5 km
(b) Skateboarder A stopped. Perhaps he fell and
hurt himself.
(c) 10 km/h (d) 07:15
(e) 37.5 min
(f) Skateboarder A won by 7.5min.
6. Answers will vary.
Exercise 14.5
1. (a)
Time of
day
Distance
from the start
Time from
the start
Comments
05:00 0 km 0 min Fetched sheep
06:30 3 km 1.5 h Arrived at grazing
area
07:30 3 km 2.5 h Stopped
09:00 0 km 4 h Arrived back at the
farm
(b)
Distance (km)
5
4
3
2
1
Shepherd’s journey
0
05:00 05:30 06:00 06:30 07:00 07:30 08:00 08:30 09:00
Time of day
(c) 6 km/ 4 h = 1.5 m/h average speed
2. (a)
Tiro and father’s journey
Distance (km)
5
4
3
2
1
0
09:00 09:30 10:00 10:30 11:00 11:30 12:00
Time of day
(b) 30 min
(c) 1 h
(d) ____ 8 km = 2.7 km/h (to 2 d.p.)
3 h
(e) 12:00
3. (a)
The journey of the bee
Distance (km)
8
7
6
5
4
3
2
1
0
0 5 10 15 20 25 30 35 40
Time (min)
(b) 15:00
(c) 10 min
(d) 0.5 km/min or 30 km/h
66