Question

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1️⃣A car moves with a speed of 40km/h for 15 minutes & then with a speed of 60km/h for the next 15 minutes. Find the total distance covered by the car in these 30 minutes.
2️⃣Two cars, A & B, (starting, at the same time, from the same point) are moving with average speeds 49km/h & 50 km/h, respectively, in the se direction. Find how far will Car B be from car B from Car A after 3 hours.
Chapter:- 06 Motion & time ; Subject:- Physics ; Class:- 7 ; School:- DAV
(THANK YOU RAJSHREEVAISNAV FOR THANKING MY ANSWER)



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Answer 1

The correct option is (ii)

Answer = 25 km

1st case,

Speed = 40 km/hr

and time taken = 15 min 

So, distance = 

Case 2nd,

Speed = 60 km/h

Time taken = 15 min = 0.25 h

So, Distance travelled = 

So, total distance = 15 + 10 = 25 km

Answer 2

αnswєr❄

Speed of car in first 15 minutes = 40 km/h

Speed of car in first 15 minutes = 40 km/hDistance covered = speed × Time taken

Speed of car in first 15 minutes = 40 km/hDistance covered = speed × Time taken60 minutes = 1 hour

hσpє ít hєlps чσu☃