Question

Astrid travels 130 km in 2 hours and then at 85 km/h for another 3 hours to reach her

destination. On the return journey home, she travels a total of 5 hours.
Determine the speed of the car that Astrid will travel to get home.

Answer 1

`\huge\boxed{\sf Speed = 77\ km/hr}`

Explanation:

Formula to be used in the question:

• Speed = Distance / Time

Distance for the first 2 hours:

= 130 km

Distance for the next 3 hours:

Speed = 85 km/h

Time = 3 hours

So,

Distance = Speed × Time

Distance = 85 × 3

Distance = 255 km

So,

Total distance from home to destination:

= 130 + 255

= 385 km

Speed on the return journey:

Total distance = 385 km

Time = 5 hours

Speed = Distance / Time

Speed = 385 / 5

Speed = 77 km/hr

`\rule[225]{225}{2}`