exam Maths Puzzle Numerical Ability

log r - log t + 2 log s

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An express and local train leave Grays Lake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find the speed of each train. I have a problem and I need help graphing this problem.
The volume of a cylinder is given by V= (pi)r^2h where r is the radius of the cylinder and h is the height of the cylinde