Marksman 78334

The igniter cord used in normal quarry blasting burns at a rate of 8 mm/s, the length usually used is 60 cm. At what minimum speed must the marksman move to a shelter 150 m away?

Correct answer:

v2 =  2 m/s

Step-by-step explanation:

v1=8/10=54=0.8 cm/s s1=60 cm s2=150 m  t=s1/v1=60/0.8=75 s  t= s2/v2  v2=s2/t=150/75=2 m/s



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