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Byju's Answer
Standard XI
Physics
Car covers di...
Question
Car covers distance
s
with a speed
v
o
. It further covers
3
s
distance with speed
2
v
o
, and then next
5
s
distance with
3
v
o
. Find its average speed.
A
54
38
v
o
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B
v
o
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C
54
19
v
o
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D
54
25
v
o
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Solution
The correct option is
D
54
25
v
o
v
a
v
g
=
Total Displacemnt
Total Time
v
a
v
g
=
S
+
3
S
+
5
S
S
v
o
+
3
S
2
v
o
+
5
S
3
v
o
=
9
(
6
6
v
o
+
9
6
v
o
+
10
6
v
o
)
=
9
×
6
v
o
25
=
54
25
v
o
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0
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