# What happens if half a third of the unfolded corner is divided by 6? What happens if half of four-fifths

January 31, 2021 | education

| **What happens if half a third of the unfolded corner is divided by 6? What happens if half of four-fifths of the right angle is divided by 4? The speed of the river is 3.5 km / h. What is the speed of the boat if it is known that, having forgiven the flow of the river, the boat will sail 24 km for 2 hours?**

1. The unfolded angle is 180.

180: 3: 2: 6 = 60: 2: 6 = 30: 6 = 5.

2. The right angle is 90.

((90 x 4/5): 2): 4 = 90: 5 x 4: 6: 4 = 90: 5: 6 = 90: (5 x 6) = 90: 30 = 3.

3. First, find the speed of the boat against the current:

24: 2 = 12 km / h.

Then subtract the current speed from the result and get the net boat speed:

12 – 3.5 = 8.5 km / h.

Answer: boat speed 8.5 km / h.

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