Mathematical Reasoning and Aptitude
5.65
ASSESS YOUR LEARNING
217.
(d):
Distance travelled in 2 hours
=
35
×
2
=
70 km
Distance travelled in next 3½ hours
=
60
×
3.5
=
210 km
Distance travelled in next 2½ hours
=
70
×
2.5
=
175 km
Total distance
=
70
+
210
+
175
=
455 km
Average speed
=
Total distance/Total time taken
=
+
+
+
+
(
)
(
.
.)
70
210
175
2
35
25
=
455/8
=
56.87 kmph
218.
(a):
The present total age of husband and wife
=
2
×
(22
+
5)
=
54 years
Total age of family (including child)
=
54
+
3
=
57
years
Average age of family
=
57
3
=
19 years
219.
(b): ...
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