#49 The tree in the snow globe
I have a snow globe that is a hollow hemisphere. At its highest point, it is 10 centimetres tall, and in the centre stands a tree that is 6 cm tall. How far away from the centre can the tree be moved and still stand upright?
Answer next week
#48 Seeing red
Solution
If I see a green traffic light, I should ease off as I will miss the light. If I see a red light, I should accelerate. The actual speed/distance doesn’t affect the answer, but suppose I am riding at 4…
