ncert exercise 81

1:21:25

9:13

2:23

1:28:34

7:40

1:00:25

5:37

17:30

5:49:55

6:41

9:34

1:11:00

1:43:55

2:26:16

26:24

16:18

1:11:03

52:48

2:01:15

11:10

8:58

41:47

1:03:44

9:37

8:18

4:55

58:01

6:46

7:59

5:31

6:55

4:42

9:08

6:09

6:17

15:44

1:15:11

2:38

4:05

2:14:18

20:06

12:45

48:58

40:52

16:40

58:23

5:36

24:08

2:00:24

14:19

5:37

8:30

47:28

1:45:01

48:17

1:22:42

00:40

3:49

26:55

16:03