# Math Help - percentages

1. ## percentages

A man travelled 420 kilometres in 12 hours .How much time would he have taken to cover 630 kilometres if he travelled non-stop at the same speed?

2. $\frac{630*12}{420}=18$ hours

3. Originally Posted by uma
A man travelled 420 kilometres in 12 hours .How much time would he have taken to cover 630 kilometres if he travelled non-stop at the same speed?
Hi uma,

Not sure what your question has to do with percentages, but.....

Remember that 'distance = rate x time', so 'rate = distance / time'

Rate = 420/12 = 35 km/hr

At this rate, to travel 630 km it would take 630/35 = 18 hours.