A kite is 30m from the ground. A cyclist observes it flying when he looks up at an angle of 20°. After 15 seconds, the cyclist has to look up at an angle of 60° to see the kite. Calculate the speed of the cyclist. Give your answer in km/h.

Last month, leonhard euler's watch kiosk at the mall had total sales of $9,489. merchandise totaling $225 was returned. the goods that were sold cost leonhard euler's $5,481. operating expenses for the moth were $992. what was the gross profit on sales?