Answer the following questions with the help of the railway timetable given below.
a. Find the arrival time for the train nos. 3020 and 6385 using the 12-hour clock.
b. Find the departure time for the train nos. 3020 and 2946 using the 12-hour clock.
Calculate how long the train nos. 2946 and 6385 will stop at the stations.

Once there was heavy downpour for about 3 hours in the early morning. Irfan and his family were finding it difficulat to carry out their daily morning chores as the sewer water was flowing back into the toilits, th road in front of their house was flooded with water and they could not move out. On this very serious problem Irfan called a meeting of all the residents. In the meeting Irfan discussed th problem and said that we as using too much polythene bags and other plastic items which we throw here and there. All these move into the drains and sewer lines which get choked and do not allow flow of water. As these are non-biodegradable, they remain as such for a long time. So to overcome this problem, we should use bags made up of cloth or jute which are biodegradable. (i) Answer the following questions : (i) Name a polymer which is biodegradable. Write the sturctures of monomers and the repeating unit. (ii) Write two uses of this polymer. (iii) Write any two values shown by Irfan.

Two friends Seema and Aditya work in the same office at Delhi. In the Christmas vacations, both decided to go to their hometowns represented by Town A and Town B respectively in the figure given below. Town A and Town B are connected by trains from the same station C (in the given figure)in Delhi.Based on the given situation, answer the following questions: img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/MATH_041_X_SQP_E03_007_Q01.png" width="80%"gt (i) Who will travel more distance, Seema or Aditya, to reach to their hometown? (ii) Seema and Aditya planned to meet at a location D situated at a point D represented by the mid-point of the line joining the points represented by Town A and Town B. Find the coordinates of the point represented by the point D . (iii) Find the area of the triangle formed by joining the points represented by A, B and C.