A car is fitted with a convex side–view mirror of focal length 20 cm. A second car 2.8 m behind the first car is overtaking the first car at a relative speed of 15 m/s. The speed of the image of the second car as seen in the mirror of the first one is :
A
m/s
B
m/s
C
10 m/s
D
15 m/s
Text Solution
Verified by ExpertsThe correct answer is:
B
Mirror formula :
v = 
v Ι = – 
∴ v Ι = – 
∴ v Ι = 
v Ι = 
m/s
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