30 Km/hr

36 Km/hr

80 Km/hr

90 Km/hr

B. 36 Km/hr

Distance covered = 120+120 = 240 m

Time = 12 s

Let the speed of each train = x.

Then relative velocity = x+x = 2x

2x = distance/time = 240/12 = 20 m/s

Speed of each train = x = 20/2 = 10 m/s

= 10*18/5 km/hr = 36 km/hr

230 meters

235 meters

240 meters

245 meters

150 meter

145 meter

140 meter

135 meter

120 metres

180 metres

324 metres

150 metres

45 meter

50 meter

55 meter

60 meter

7 second

7.5 second

8 second

8.5 second

65 sec

89 sec

100 sec

150 sec

40 sec

42 sec

45 sec

48 sec

15 seconds

12.1 seconds

10 seconds

8.1 seconds

130

360

500

540

66 km/hr

72 km/hr

78 km/hr

81 km/hr

25 Seconds

28 Seconds

30 Seconds

35 Seconds

50 m

72 m

80 m

82 m

$23m$

$23\frac{2}{9}m$

$27\frac{7}{9}m$

$29m$

40 meter

45 meter

50 meter

55 meter

10

12

15

20

9 a.m.

10 a.m.

10.30 a.m.

11 a.m.

1 : 3

3 : 2

3 : 4

None of these

320 m

350 m

650 m

Data inadequate

48 km/hr

54 km/hr

66 km/hr

82 km/hr

69.5 km/hr

70 km/hr

79 km/hr

79.2 km/hr

230 m

240 m

260 m

270 m

140 meter

145 meter

150 meter

155 meter

10.7 Seconds

10.8 Seconds

10.9 Seconds

11.8 Seconds

10

18

36

72

2.5 min

3 min

3.2 min

3.5 min

3.6 sec

18 sec

36 sec

72 sec

45 m

50 m

54 m

72 m

25

30

40

45

5 sec

6 sec

7 sec

10 sec

12 sec

24 sec

48 sec

60 sec