City R and City S are 336 km apart. At 1.34 p.m., Owen is travelling at a uniform speed left City R for City S while Jenson set off from City S to City R along the same road at a uniform speed, which was 12 km/h slower than that of Owen. The two met at 3.34 p.m.

1. Find the speed of Owen.
2. If Jenson continued to travel at the same speed, how long would it take for him to reach his destination after the two met? Express your answer in mixed number.

(a)
Time taken for Owen and Jenson to travel from 1.34 p.m. to 3.34 p.m. = 2 h

Average speed of Owen and Jenson
= 336 ÷ 2
= 168 km/h

Owen's speed
= (168 + 12) ÷ 2
= 180 ÷ 2 
= 90 km/h

(b)
Jenson's speed
= 90 - 12
= 78 km/h

Distance that Jenson travelled in 2 h
= 2 x 78
= 156 km

Remaining distance that Jenson needed to travel
= 336 - 156
= 180 km

Time that Jenson needed to reach his destination after the two met
= 180 ÷ 78
= 2²⁴₇₈
= 2⁴₁₃ h

Answer(s): (a) 90 km/h; (b) 2⁴₁₃ h