Distance problems

Question

Ryan left the hardware store and ddrove toward the lake.three hrs later Danielle left driving at 70km/h in an effort to catch up to ryan. after driving for 2 hrs Danielle finally caught up. find Ryans's average speed.

Answer 1

(2+3)r=2(70)

r=140/5-=28 kph = ryan's speed

they both drove 140 km

distance = speed times time

ryan drove for 5 hours, 5x28 = 140 km

danielle drove for 2 hours, 2x70 = 140 km