The ground was level; the car reached a speed of five miles an hour.

It was lower than we were and coming toward us at a speed of perhaps 300 miles an hour.

But speeds of 50 to 60 miles an hour should become possible within several years, he added.

They range in price from $300 to $1,200 and reach a top speed of only 15 to 17 miles per hour, she said.

But it always takes at least five hours, for an average speed of 50 miles per hour.

Built in 1884, it has a top speed of 35 miles per hour.

A top speed of 25 miles an hour was all right by me.

The boat had a speed of about 20 miles an hour.

It would need to gain a speed of almost 5 miles per second.

They moved away at a speed of possibly 20 to 30 miles an hour.