Question
Download Solution PDFA woman drives a car. During her journey, she travels 20 minutes at a speed of 60 km/hr, another 30 minutes at a speed of 40 km/hr and 1 hour at a speed of 50 km/hr. The average speed of the car is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
The first 20 speed of woman = 60 km/hr
The next 30 minutes speed of the woman = 40 km/hr
The next 1 hours the speed of woman = 50 km/hr
Formula used:
Calculation:
Let the average speed be X
According to the question
⇒ The distance covered by woman in 20 minutes =
⇒ The distance covered by woman in 30 minutes =
⇒ The distance covered by woman in 1 hours = 50 × 1 = 50 km
The total distance = 20 + 20 + 50 = 90 km
The total time = 20 min + 30 min + 60 min = 110 min =
The average speed =
∴ The required result will be
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