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Grade: 11
        
a man watches a carpenter driving nails at the rate of 4 stroke per second he hears  the sound of the blow  exactly synchronised with the blow he sees  he hears  two more blows  he sees the crrpentor stop hammering the distance of the corporator is
6 months ago

Answers : (1)

Arun
21037 Points
							
so he hits one blow every 0.25 sec. and the sound is delayed by that amount, 0.25 sec. 

343 m/s (speed of sopund) 

343 m/s x 0.25 sec = 85 meters 
6 months ago
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