https://preparationpoint.info/solved-past-papers-mcqs/ppsc-past-papers/ppsc-past-papers-2020/assistant-bs-16-land-record-authority-2020/five-years-ago-the-average-age-of-p-and-q-was-25-years-the-average-age-of-p-q-and-r-today-is-25-years-how-did-will-r-be-after-5-years/