60 km/ hr = 120 km /( 1+90/v) h
Answers
Answered by
2
Answer:
v = 90
hope it will help you
Answered by
0
Answer:90km/h
Explanation:Average speed=Total distance Total time taken
V
av
=
t
d
ort=
V
av
d
For 120 km,
t=
60 km/hr
120 km
=2 hr ......(i)
For 1st 30 km,
t
1
=
30 km/hr
30 km
=1 hr
For remaining 90 km,
t
2
=t−t
1
=2−1=1 hr
speed=
time
distance
or v
2
=
t
2
d
2
=
1
90
=90 km/hr
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