Question

Two brothers decided to bike to visit their grandma who lived 12 miles away. One of them biked at speed 8 mph and then he waited for his brother for 30 minutes. What was the speed of the second brother?

Answer 1

6 m/hr

Explanation:

The first brother took 12/8 = 1.5 hr

the second brother took 1.5 + .5 = 2hours

12 miles / 2 hrs =