book Maths Puzzle Numerical Ability

i^-3

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book Other Question

A building that is 150 ft tall casts a shadow of 20 feet long. At the same time a tree casts a shadow of 2 ft. How tall is the tree?
LA & SF are 470 miles apart. An express train leaves LA at the same time a passenger train leaves SF. Express train travels 10 mph faster than passenger train. 2 trains pass each