Question
Anita takes 3 hours to travel from city 'A' to city 'B' at
the speed of 60 km/h. After that, she increases her speed by 40% and takes 2 hours to travel from city 'B' to city 'C'. What is the average speed of Anita while travelling from city 'A' to 'C'?Solution
ATQ,
Distance between city 'A' and city 'B' = 60 × 3 = 180 km
Distance between city 'B' and city 'C' = 60 × 1.4 × 2 = 168 km
Total distance travelled by Anita = 180 + 168 = 348 km
Total time taken by Anita = 3 + 2 = 5 hours
Average speed of Anita = 348 / 5 = 69.6 km/h
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