Question

John & Maria drove for $13$ hours at $55$ miles per hour. If they had travelled at a rate of $65$ miles per hour, calculate the time(in hours) they would have saved.

• A. $0.5$
• B. $1$
• C. $2$
• D. $6$
• E. $11$

Answer 1

The correct option is C $2$

John drove for $13$ hours at $55$ miles per hour.

So the total distance travelled is $=13\times 55=715$miles

Now if the travelled the same distance at $65$ miles per hour. then time taken to cover same distance will be $=\frac{715}{65}=11$hours.

So they would have saved $13-11=2$ hours, if they had travelled at $65$ miles per hour.