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Grade: 7

                        

Two person p and q are standing at a distance of 100m from a hight wall when p give a clap .the time interval between the two sounds heard by 0.2 second.if the speed of 340mper second.find the distance of p and q.

2 years ago

Answers : (1)

Arun
24742 Points
							
Dear Vikash
 /340 where, D = Perpendicular distance from line PQ to the wall = 100Difference between the two = 0.2 SSolve for d.\sqrt{D^{2} + (d/2)^{2})}Draw perpendicular from the reflecting point to the line joining PQ.So, time taken for coming directly, t= d/340When coming after reflection, t= 2X 489-1597_reff.gifLet the distance is d.
 
Regards
Arun
2 years ago
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