The distance between Town V and Town W was 186 km. At 07 00, Cathy left Town V and cycled towards Town W. Risa left Town V and cycled towards Town W at 07 30. Risa's cycling speed was 2 km/h faster than Cathy. At 11 00, Risa caught up with Cathy. When Risa was 26 km from Town W, she stopped to wait for Cathy. How far was Cathy from Risa when she stopped to wait for him?
Duration in which Risa cycled for before she caught up with Cathy
= from 07 30 to 11 00
= 3 h 30 min
= 3 ³⁰₆₀ h
= 3 ¹₂ h

Distance that Risa cycled more than Cathy
= 3¹₂ x 2
= ⁷₂ x 2
= 7 km

Cathy's cycling speed
= 7 x 2
= 14 km/h

Risa's cycling speed
= 14 + 2
= 16 km/h

Distance that Risa cycled before she stopped to wait for Cathy
= 186 - 26
= 160 km

Duration that Risa cycled for after she caught up with Cathy and when she stopped to wait for Cathy
= (160 ÷ 16) - 3¹₂
= 10 - 3¹₂
= 6¹₂ h

Distance Cathy was from Risa when she stopped to wait
= 2 x 6¹₂
= 13 km

Answer(s): 13 km