1. Solve the following problem from the Bakhshāli manuscript: One person goes 4 yojanas a day. When he has proceeded for seven days, the second person, whose speed is 9

yojanas a day, departs. In how many days will the second person over take the first? 2. The sixth-century Hindu mathematician Āryabhata had the following procedure for finding the area of a circle: Half the circumference multiple by half the diameter is the area of a circle. How accurate is this rule?