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Motion in a Straight Line
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Speed and Velocity
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Rajdhini express moves at a speed of 150
Question
Rajdhini express moves at a speed of
1
5
0
Ā
k
m
/
h
. How long will it take to cover a distance of
1
5
Ā
k
m
?
A
0
.
1
Ā
h
B
1
.
1
2
5
Ā
h
C
2
.
1
2
5
Ā
h
D
3
.
1
2
5
Ā
h
Medium
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Updated on : 2022-09-05
Solution
Verified by Toppr
Correct option is A)
Given,
Speed
v
=
1
5
0
Ā
k
m
/
h
distance cover = displacementĀ
d
=
1
5
Ā
k
m
Ā Ā Ā Ā Ā (Assume express is not changing its direction)
V
e
l
o
c
i
t
y
Ā
(
V
)
=
t
i
m
e
Ā
(
t
)
D
i
s
p
l
a
c
e
m
e
n
t
Ā
(
d
)
ā
Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā
t
=
V
d
ā
=
1
5
0
1
5
ā
=
0
.
1
Ā
h
r
Time taken
t
=
0
.
1
Ā
h
r
Ā Ā Ā
Option A
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