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BECE Mathematics 2014 Paper
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© africaexams.com
Question : 17
Total: 40
Jane arrived at work at 7:55 a.m and left at 4:15 p.m. For how long was she at work?
7 hr 20 min
7 hr 45 min
8 hr 20 min
8 hr 40 min
Validate
Solution:
7
:
55
=
7
hours 55 minutes
4
:
15
=
4
hours 15 minutes
Using the 24 hour system. Afternoon is 12 hours.
4
:
15
p
⋅
m
=
12
hr
+
4
hr
+
15
min
4
:
15
p
⋅
m
=
16
hr
+
15
min
Hours difference
=
16
−
7
=
9
hours
Minutes difference
=
15
−
55
=
−
40
minutes
1
hour
=
60
minutes
9
hours
=
8
hours
+
60
minutes
Total time
=
9
hours
−
40
minutes
Total time
=
8
hours
+
60
minutes
−
40
minutes
Total time
=
8
hours
20
minutes
Total time
=
8
hr
20
min
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