CTET Paper I (Classes I to V) Feb 2014 Solved Paper

Concept:The distance between two stations is the difference in their distances from a common reference point. Average speed is total distance divided by total time.Explanation:Ahmedabad is 301 km from Gandhidham. Nagercoil is 2649 km from Gandhidham. The distance between them is $2649 - 301 = 2348$ km. So conclusion A is correct.Departure from Ahmedabad on 10.2.2014 at 11:50 a.m. Arrival at Nagercoil on 12.2.2014 at 4:45 a.m. Time difference = from 11:50 a.m. on 10th to 11:50 a.m. on 12th is 48 hours, minus 7 hours 5 minutes gives 40 hours 55 minutes. So conclusion B is correct and C is incorrect.Average speed = $\frac{2348}{40 + \frac{55}{60}} \approx \frac{2348}{40.916} \approx 57.4$ km/h. This is not about 80 km/h, so conclusion D is incorrect.Answer:The correct conclusions are A and B only. Option C is correct.