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1.	A car is travelling from city P to city Q, which are 350 km apart. The line graph given below describes the distance of the car from the city P at different times.Study the above graph and answer the questions given below(i) What information is given on the two axes?(ii) From where and when did the car begin its journey?(iii) How far did the car go in the first hour?(iv) How far did the car go during (a) the 2nd hour (b) the 3rd hour?(v) Was the speed same during first three hours? How do you know it?(vi) Did the car stop for some duration at any place? Justify your answer.(vii) When did the car reach the city Q?
Answer» (i) On the two axes – the x-axis shows the time and y-axis shows the distance of the car from city P. (ii) The car begins its journey from city P at 8:00 a.m. (iii) The car covered a distance of 50km in the 1^st hour. (iv) The car covered a distance of(a) 100 km in the 2^nd hour. (b) 50km in the 3^rd hour. (v) No the speed was not same, because the distance covered per hour is not uniform. (vi) Yes, the car stopped at a place during the time interval 11a.m. to 12a.m. as indicated by horizontal line segment during this period. (vii) At 2p.m. the car reached at the city Q.

A car is travelling from city P to city Q, which are 350 km apart. The line graph given below describes the distance of the car from the city P at different times.Study the above graph and answer the questions given below(i) What information is given on the two axes?(ii) From where and when did the car begin its journey?(iii) How far did the car go in the first hour?(iv) How far did the car go during (a) the 2nd hour (b) the 3rd hour?(v) Was the speed same during first three hours? How do you know it?(vi) Did the car stop for some duration at any place? Justify your answer.(vii) When did the car reach the city Q?

Answer»

(i) On the two axes – the x-axis shows the time and y-axis shows the distance of the car from city P.

(ii) The car begins its journey from city P at 8:00 a.m.

(iii) The car covered a distance of 50km in the 1^st hour.

(iv) The car covered a distance of(a) 100 km in the 2^nd hour.

(b) 50km in the 3^rd hour.

(v) No the speed was not same, because the distance covered per hour is not uniform.

(vi) Yes, the car stopped at a place during the time interval 11a.m. to 12a.m. as indicated by horizontal line segment during this period.

(vii) At 2p.m. the car reached at the city Q.

Discussion

2.	A man started his journey on his car from location A and came back. The graph given below shows his position at different times during the whole journey.Study the above graph carefully and answer the questions given below:(i) At what time did he start and end his journey?(ii) What was the total duration of the journey?(iii) Which journey, onwards or return, was of longer duration?(iv) For how many hours did he not move?(v) At what time did he have the fastest speed?
Answer» (i) The start journey was at 5.30 a.m and the end journey was at 6 p.m. (ii) The total duration of the journey was 12 hour 30 minutes. (iii) The onwards journey took longer duration. (iv) He did not move for 6 hours. (v) During 2 p.m to 5.30 p.m period he had the fastest speed.

A man started his journey on his car from location A and came back. The graph given below shows his position at different times during the whole journey.Study the above graph carefully and answer the questions given below:(i) At what time did he start and end his journey?(ii) What was the total duration of the journey?(iii) Which journey, onwards or return, was of longer duration?(iv) For how many hours did he not move?(v) At what time did he have the fastest speed?

Answer»

(i) The start journey was at 5.30 a.m and the end journey was at 6 p.m.

(ii) The total duration of the journey was 12 hour 30 minutes.

(iii) The onwards journey took longer duration.

(iv) He did not move for 6 hours.

(v) During 2 p.m to 5.30 p.m period he had the fastest speed.

Discussion