ncertexercise7

41:46

47:35

1:01:13

36:31

49:06

48:23

11:00

44:14

1:01:34

52:38

8:38

45:24

34:20

6:33

38:48

19:22

6:36

35:24

1:12:02

34:10

1:58:43

41:16

7:01

5:10

1:35:38

54:45

6:09

4:27

13:31

3:28

13:57

54:27

17:20

2:09:51

6:13

16:38

8:09

12:51

12:43

46:16

53:54

55:37

34:25

51:47

1:27:40

57:54

58:23

16:05

48:30

49:23

47:54

57:03

10:48

8:27

1:37:29

7:02

47:07

1:01:55

50:51

59:02