A hiker ascended 3/4 of a kilometer in 1/16 of an hour. What was the mountain hiker's ascent rate in kilometers per hour (kph)?

To find the ascent rate in kilometers per hour (kph), we divide the distance ascended (3/4 kilometer) by the time taken (1/16 hour).

(3/4) km ÷ (1/16) hr = (3/4) km × (16/1) hr = 3 km × 16/4 = 12 km/hr

Therefore, the mountain hiker's ascent rate was 12 kph.