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What is the correct answer?
4
A person travels from P to Q at a speed of 40 km/hr and returns by increasing his speed by 50%. What is his average speed for both the trips ?
A.
44 km/hour
B.
46 km/hour
C.
48 km/hour
D.
50 km/hour
Correct Answer :
C. 48 km/hour
Speed while going = 40 km/hr
Speed while returning = 150% of 40 = 60 km/hr
Average speed =
2
x
y
x
+
y
=
2
×
40
×
60
40
+
60
=
4800
100
=
48
K
m
/
h
r
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