Question

Hamidah travels 90 miles at an average speed of 50 mph.

She then travels a further 60 miles.
The average speed for the entire journey is 54 mph.
Assuming Hamidah didn't stop, what was her average speed for the final 60 miles to 2 dp?

Answer 1

Answer: 61.36mph

Explanation:

let the speed be x

`(90)/(50) + (60)/(x ) = (90 + 60)/(54)`

`1.8 + (60)/(x) = (25)/(9)`

60/x=44/45

X = 61.36 (mph)

So her average speed for the 60 miles is 61.36 mph.

hope it helps #itzadmirer