Question

A race track is in the shape of a rectangle with length of 30 metres and area of 900 m2. A car takes 15 seconds to make one lap around the perimeter of this track. If the car and a person whose speed is 5 m/s, started moving at the same time along the perimeter of the track but in opposite directions, then find the distance between the car and the person, 3 seconds before they cross each other.

Q: Answer-A race track is in the shape of a rectangle with length of 30 metres and area of 900 m2. A car takes...

Area of the track length of track x breadth of track 30 x breadth of track 900 So, breadth of track 900 30 30 So, perimeter of the track 30 30 x 2 120 metres So, speed of the car 12015 8 ms Relative speed of the car with respect to the person 8 5 13 ms So, distance between the car and the person, 3 seconds before they cross each other 13 x 3 39 metres