A race track is in the shape of a rectangle with length of 75 metres and area of 3000 m2. A car takes 20 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.
Area of the track = length of track x breadth of track = 75 x breadth of track = 3000 So, breadth of track = 3000 ÷ 75 = 40 So, perimeter of the track = (75 + 40) x 2 = 230 metres So, speed of the car = (230/20) = 11.5 m/s Relative speed of the car with respect to the person = 11.5 + 5 = 16.5 m/s So, distance between the car and the person, 3 seconds before they cross each other = 16.5 x 3 = 49.5 metres
A system in which forest trees are grown along with agricultural crops and grasses on the same land at the same time is known as ____
Which one of the following is mass approach in extension and communication?
The persons who starts to adopt new practices quickly or at first are called
Which of the following is main objective of puddling in paddy?
T and V system, 1974 started by Daniel Benor is also known as
Last people to adopt new practices and are traditional:
Whole Family Principle is a:
Etawah Pilot Project was launched under the leadership of
The rural development projects and men behind them are listed below. Which of the following is correctly matched?
1. Bhoodan Movement...
Visual aid of communication includes which of the following?
