Question
A bus takes 10 seconds to pass a standing man and 28
seconds to pass a traffic light, which is 405 meters long. Determine the time it takes for the bus to pass a boy running towards it at a speed of 9 km/h.Solution
ATQ, Let the length of the bus be 'x' meters. So according to question: x/10 = (x + 405) /28 28x = 10x + 4050 18x = 4050, x = 225 So, the length of the bus = 225 meters Speed of the bus = 225/10 = 22.5 m/s Speed of the boy = 9 X 5/18 = 2.5 m/s Relative speed of the bus = 22.5 + 2.5 = 25 m/s So, the time taken by the bus to cross the boy = 225/25 = 9 seconds
Instrument used for measuring solar radiation is:
The inflorescence of sugarcane is known as:
Which among the following antibiotics is obtained from fungi?
Enzymes are by nature:
Barbara McClintok is associated with
__________is the fraction of water entering the soil that must pass through the root zone in order to prevent soil salinity from exceeding a specified v...
The ratio between C and N crop residue generally ranges between __ ?
Khaira disease of rice is due to
Which color sticky traps are used for aphids and white fly?
Maximum moisture content for safe storage in wheat seed is:
