A motorist travelled 1/2 of its journey at 60 km/h and completed of the remaining 90 km in 1 ½ hours what was his average speed for the whole journey
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Answer:
180
Step-by-step explanation:
1 - 1/2=1/2 =90km
1/2+1/2=1
=90+90=180
hence the answer is 180
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