A car travelled with a speed of 25ms^(-1) What is this speed in mile per hour?

56 mph

1. We are given the speed of the car as 25 m/s. We need to convert this to miles per hour (mph).

2. First, let's convert meters to miles. There are approximately 1609.34 meters in 1 mile. Therefore, we can write:

25 m/s * (1 mile / 1609.34 m) = 0.01553 miles/s

1. Now, let's convert seconds to hours. There are 60 seconds in a minute and 60 minutes in an hour, so there are 3600 seconds in an hour. Therefore:

0.01553 miles/s * (3600 s / 1 hour) = 55.91 mph

1. Rounding to a reasonable number of significant figures (given the initial speed had two significant figures), we get 56 mph.