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What is the correct answer?
4
A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The average speed for the first 320 km of the tour is:
A.
35.55 km/hr
B.
36 km/hr
C.
71.11 km/hr
D.
71 km/hr
Correct Answer :
C. 71.11 km/hr
T
o
t
a
l
t
i
m
e
t
a
k
e
n
=
160
64
+
160
80
h
r
s
.
=
9
2
h
r
s
.
∴
A
v
e
r
a
g
e
s
p
e
e
d
=
320
x
2
9
k
m
/
h
r
=
71
.
11
k
m
/
h
r
.
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