Choose the 2 true statements?

A) using Naismith's rule to plan a walk would give different times to walk up a hill as down it, on the same path.





B) On a map with a scale of 1:200 000, 5cm on the map will represent 1km on the ground





C) On a map with a scale os 1:20 000, an area of 4km2 on the ground will be represented by an area of 100cm2 on the map





D) If the bearing of a boat from a lighthouse is 030 degrees then the bearing of the lighthouse from the boat is 150degrees





E) A road gradient of 25% is exactly the same as a mathematical gradient of 0.25





F) The walking distance between 2 hill tops is likely to be the same as the distance between the 2 hill tops calculated using their grid references





Can anyone please help me. I think A is false

Choose the 2 true statements?
A) Naismith's rule allows for slow downs when going uphill (ascent). which means the time for going up a hill is greater than the time going down the same hill. I think A is true.





B) at a scale of 1:200,000 the 5 cm = 1,000,000 cm, but there are 100 cm per meter, so the 5 cm = 10,000 meters or 10km. Therefore B is false.





C) If the scale is 1:20,000 then 100 cm^2 would be a 10 x 10 cm area. 10 cm = 200,000 cm = 2000 meters (100 cm = 1 meter), = 2 km. so the square would contain 4 km^2


so C is true.





D) if the bearing from the lighthouse is 30 degrees (assuming north is 0 degrees) then the bearing of the lighthouse from the boat is (180+30) = 210 degrees, remember the angle is clockwise. False.





E). ?





F) using the grid coordinates (even 3D coordinates, x,y,z) would give the straight line distance between the tops of the two hills, it would not allow for walking down into the valley between them, False.
Reply:B%26amp;F
Reply:b %26amp; e
Reply:A and C are correct.





B is false, 5cm on the map would represent 10km.





D is also false, the bearing would be 210.





E is false. A gradient of 0.25 on a graph would be the same as an incline of 12.5%





F is false as unless there is a bridge from hilltop to hilltop then this would be impossible.