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Omni-MATH / At what speed does Jeff run if Jeff and Ursula each run 30 km, Ursula runs at a…

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problem

At what speed does Jeff run if Jeff and Ursula each run 30 km, Ursula runs at a constant speed of $10 \mathrm{~km} / \mathrm{h}$, and Jeff's time to complete the 30 km is 1 hour less than Ursula's time?
Plain-text mathematical notation (without MathML)
At what speed does Jeff run if Jeff and Ursula each run 30 km, Ursula runs at a constant speed of $10 \mathrm{~km} / \mathrm{h}$, and Jeff's time to complete the 30 km is 1 hour less than Ursula's time?
Original LaTeX notation
At what speed does Jeff run if Jeff and Ursula each run 30 km, Ursula runs at a constant speed of $10 \mathrm{~km} / \mathrm{h}$, and Jeff's time to complete the 30 km is 1 hour less than Ursula's time?

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