I think , in my opinion it’s is the middle I’m not that sure but if u can try then good luck
About 1.5 hours since you would do distance divided by the rate to get the time.
Let S=larger square side and s=smaller square side. The area between the larger and smaller is simple the larger area minus the smaller area. The area of any square being s^2. So our remaining area is:
A=S^2-s^2
A=144-49=95 cm^2
