Question

Mrs Sharada drove at 80 km/h for 45 min. She rested for 15 minutes and
continued the rest of the journey of 50 km for another hour. What was her
average speed for the whole journey?


pls reply!​

Answer 1

Answer:

55 km/h

Step-by-step explanation:

Speed = 80 km/h

Time taken = 45 mins

Change the duration from mins to hours

45 mins = 45 ÷ 60 hour = 0.75 hour

Find the distance:

Distance = Speed x Time

Distance = 80 x 0.75 = 60 km

Find the total distance from the journey:

Total Distance = 60 + 50 = 110

Find the total time taken:

Rested for 15 mins = 15 ÷ 60 = 0.25 hour

Continued Traveling for 1 hour

Total time = 0.75 + 0.25  + 1 = 2 hour

Find the average speed:

Average Speed = Total Distance ÷ Total Time

Average Speed = 110 ÷ 2 = 55 km/h

Answer: 55km/h