Question

Jerry ran $12$ miles at a speed of $8$ miles per hour and Tom ran the same distance at $6$ miles an hour. How much will be the difference in minutes in their completion time?

• A. $12$
• B. $16$
• C. $24$
• D. $30$

Answer 1

The correct option is D $30$

Given Jerry run $12$ miles at a speed $8$ miles per hour

And Tom run $12$ miles at a speed $6$ miles per hour

Then the time consumed Jerry $12$ miles with speed $8$ miles $=$ $\frac{12}{8}\times 60=90$ minutes

And the time consumed tom $12$ miles with speed $6$ miles $=$ $\frac{12}{6}\times 60=120$ minutes

Then difference in minutes in there completion time $=120-90=30$ minutes.