https://preparationpoint.info/solved-past-papers-mcqs/ppsc-past-papers/ppsc-past-papers-2018/model-paper-90-field-assistant-istat-crop-reporter-in-the-agriculture-department-bs-11-2018/the-train-takes-50-minutes-for-the-journey-if-it-runs-at-48-km-hour-the-rate-at-which-the-train-must-run-to-reduce-the-time-to40-minutes-will-be/