Question
Julie started jogging from the playground to the reservoir at a speed of 115 m/min at 6 a.m. Her cousin started jogging from the playground later. They were beside each other at 6.35 a.m. and her cousin reached the reservoir at 7 a.m. while Julie was still 1500 m away. If both of them travelled at a constant speed throughout the journey, what time did her cousin leave the playground?
4 m

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Julie started jogging from the playground to the reservoir at a speed of 115 m/min at 6 a.m. Her cousin started jogging from the playground later. They were beside each other at 6.35 a.m. and her cousin reached the reservoir at 7 a.m. while Julie was still 1500 m away. If both of them travelled at a constant speed throughout the journey, what time did her cousin leave the playground?