Riddle

The quick one

A hot dog and a bun cost $1.10 together. The hot dog costs $1.00 more than the bun. How much does the bun cost?

The big one

Two friends run a 10-mile race. Friend A runs the first half of the distance at a 6 mph pace and the second half at 7.5 mph. Friend B runs the first half of the time at 6 mph and the second half at 7.5 mph. Who finishes first, and by how much?

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