There is road between two parallel rows of building and distance between the rows of building is 106 m. Find the velocity of car if a car blows a horm shose echo is heard by the drive agfter 1 s. (Given, speed of sound = 340 m/s)
A
180 m/s
B
165 m/s
C
323 m/s
D
150 m/s
Text Solution
Verified by Experts
The correct Answer is:
C
Signal goes from A to B. Let the velocity of car=v. Distance travelled AB=v,oA=`v/2` `(2xx)/1=340 rArr xx=170 m` `(170)^(2)=(53)^(2)+(v^(2))/4` `sqrt(4(28900-2809))=v" "rArrv=323m//s`
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