a motor car travell 60 km at a uniform speed of 30km/hr and the next 120km at a uniform speedvof 15km/hr find it's average speed
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Answer:
18Km/h
Explanation:
t1 = 60/30 = 2 hr
t2 = 120/15 = 8 hr
Total Distance = 60+120 = 180 Km
avg speed. = total distance /(t1 +t2)
= 180/(2+8)
=180/10 = 18Km
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