Distance between Sanna's and Sneha's house is 9km. Sanna has to attend Sneha's birthday party at 7 o'clock. She started from her home at 6 o'clock on her bicycle and covered a distance of 6km in 40 mins. At the point she meet Micky and spoke to her for 5 mins and reached Sneha's birthday party at 7 o'clock. With what speed did she cover the second part of the journey ? Calculate his average speed for the entire journey.
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Verified answer
Given:
Distance between Sanna's and Sneha's house is 9km. Sanna has to attend Sneha's birthday party at 7 o'clock. She started from her home at 6 o'clock on her bicycle and covered a distance of 6km in 40 mins. At the point she meet Micky and spoke to her for 5 mins and reached Sneha's birthday party at 7 o'clock.
To find:
With what speed did she cover the second part of the journey? Calculate his average speed for the entire journey.
Concept:
If a person has a average speed along the course of the journey, its motion can be understood by calculating average speed. Average speed by the person can be calculated by using the following formula:
[tex]\;\;\boxed{\:\textbf{\textsf{Average Speed = }} \dfrac{\textbf{\textsf{Total Distance}}}{\textbf{\textsf{Total Time\:}}}} [/tex]
This implies "Average speed is the ratio of total distance and total time taken to cover the distance."
Calculations:
Distance left to reach Sneha's house = 9km - 6km = 3km
And, Time left to reach Sneha's house = 16 min - (4 + 5) = 15 minutes
• Distance left = 3km
• Time left = 15 mins
The speed with which Sanna covered the second part of the journey:
[tex]\rm{\implies\dfrac{Distance\;left\;to\;reach\;Sneha's\;house}{Time\;left\;to\;reach\;Sneha's\;house}}
[/tex]
[tex]\rm{\implies\dfrac{3}{15}}[/tex]
[tex]\rm{\implies 0.2}⟹0.2[/tex]
Thus, the speed with which Sanna covered the second part of the journey is 0.2km/h.
We know that,
[tex]\rm{\implies Average\;Speed=\dfrac{Total\; Distance}{Total\;Time}}
[/tex]
• Total distance = 9km
• Total time = 1 hour
By substituting the given values in the formula, we get the following results:
[tex]\rm{\implies Average\;Speed=\dfrac{9}{1}}[/tex]
[tex]\rm{\implies \boxed{\textsf{\textbf{ Average Speed = 9 km/h }}}}[/tex]
\rule{300}{2}
Hence, the average speed of the entire journey is 9km/h.
Extra Information:
Average velocity is the displacement of an object over time. It is calculated by using the following formula:
[tex]\;\;\boxed{\:\textbf{\textsf{Average Velocity = }} \dfrac{\textbf{\textsf{Total Displacement}}}{\textbf{\textsf{Total Time\:}}}} [/tex]
This implies "Average velocity the change in position or displacement (Δx) divided by the change in time or time intervals (Δt)."
Answer:
Party start at 7’o clock
Total time spend by Bholu = 40 min (traveling) + 5 min (chatting) = 45 min
So Bholu has to reach Golu’s house within 15 min (1hour – 45 min)
The speed with which Bholu has to cover the second part of the journey is= 3/15 Km/min=12 Km/h
Average The average of Bholu’s in the entire journey is total distance divided by total the time taken is
=Total distance traveled / total time taken
=9Km/h
Thankeww For Thanks ❤✨
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