priyanka takes 40 minutes to cover a distance of 2 kilometres on a bicycle . calculate speed in km/h?
Answers
3 k/h hope that will help you
Answer:
✯ 68.67 km/hr ✯
Explanation:
Given:
Car travels 40 km in 30 minutes
Next 40 km in 40 minutes.
To Find:
Average speed of the car
Solution: We know that
★ Average Speed = Total Distance/ Total Time ★
\small\implies{\sf }⟹ Total Distance = (40 + 40) km = 80 km
\small\implies{\sf }⟹ Total Time = (30 + 40) minutes = 70 minutes
• Here distance is in Km and time is in minutes so we have to change it in Km/hr •
→ 60 minutes = 1 Hour
∴ 30 minutes = 30/60 = 1/2 Hours and
∴ 40 minutes = 40/60 = 2/3 Hours
\small\implies{\sf }⟹ Total time taken in hours = 1/2 + 2/3
\small\implies{\sf }⟹ 3 + 5/6
\small\implies{\sf }⟹ 7/6 Hours
Therefore,Average speed = 80 ÷ 7/6
\small\implies{\sf }⟹ 80 x 6/7
\small\implies{\sf }⟹ 480/7
\small\implies{\sf }⟹ 68.57 km/hr
Hence, Average speed of car during entire journey is 68.67 km/hr
Step-by-step explanation:
- please make it a brainliest answer.