Tom drives a truck. his regular trip is a distance of 280 km. he drives at an average speed of 80 km/h. for safety reasons tom’s boss puts a speed limiter on his truck. this reduces tom’s average speed by 10 km/h. how much longer will it take tom to drive his regular trip?

Distance = 280 km

Average speed = 10 km/h

Time = Distance / Speed

Time = 280 km / 80 km/h

        = 3.5 hours.

If the driver's speed reduced by 10 km/h, speed = 80 - 10 = 70 km/h

Time = Distance / Speed

Time = 280 km / 70 km/h

        = 4 hours.

The time would be longer by :    4 - 3.5 = 0.5 hours.

0.5 * 60 = 30 minutes.

It would be longer by 0.5 hours or 30 minutes.

Did u want to find the value of x?