https://preparationpoint.info/solved-past-papers-mcqs/ppsc-past-papers/ppsc-past-papers-2018/model-paper-85-assistant-director-bs-17-2018-in-local-government-community-development-department/a-train-running-at-the-speed-of-60km-hour-cross-the-pole-in-9-sec-what-is-the-length-of-the-train/