Answer:
B
Step-by-step explanation:
To grandparents house :
140/56 = 2.5 hours
Return trip :
140/50 = 2.8 hours
Total time : 2.8+2.5 = 5.3 hours
30
6 times 5 is 30 and since its 6 per hour you just do it to five :)
That might be the diameter of the circle
