Javed walks at the rate of 3 km/hr for 2 hours and then at the rate of 2 km/hr for 3 hours. His average speed is .... km/hr. (1) 4 (2) 2.4 (3) 2.5 (4)5
Answers
Answer:
Javed walks at the rate of 3 km/hour for 2 hours.
So, his speed in 2 hours = 3 × 2 = 6 km
He walks at the rate of 2 km/hour for 3 hours.
So, his speed in 3 hours = 2 × 3 = 6 km
His average speed = Sum of all observations / Total number of observations
= 6 + 6 / 2 km
= 12 / 2 km
= 6 km
Thus, the average speed of Javed is 6 km/hour
Step-by-step explanation:
Hope it will help you
Answer: 2.4 km/h
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Step-by-step explanation:
Speed = Distance/ time
Speed₁ = distance₁/time₁
we know that Speed₁ = 3km/h, and time₁ = 2 hours.
By substituting,
3 = distance₁/2
Distance₁ = 6km
Similarly,
Speed₂ = distance₂/time₂
We know that speed₂ = 2km/h, and time₂= 3 hours
By substituting,
2 = distance₂/3
Distance₂ = 6km
Average speed = Total distance/ total time
= (Distance₁ + Distance₂)/ (Time₁ + Time₂)
= (6 + 6) / (2 + 3)
= 12/5