Read the passage and answer the following questions.Unprecedented rainfall in Himalayan foothills during last couple of days and wide spread inundation have once again brought the old Indo-Bhutan trans boundary issue of dolomite contamination of land and its bite on tea economy of Dooars region in northern West Bengal into surface. This builds up dolomite rich debris on river bed reducing their water retaining capacity and contaminating ground water.Q.Why is the situation worse than before? Bhutan holds a reserve of 13.5 billion ton, one of the highest in the world. Although the official trade took a downturn in 80’s, complains are still there about continuation of open-pit, illegal mines. Guhathakurata, Secretary of Dooars Branch of Indian Tea Association.In the sixties, dolomite was an important export item of Bhutan to India. In addition to that, “Rejuvenation cost of dolomite affected bushes will significantly increase the loss,” said S. Large section of near 150-tea gardens in the region, producing around 20% of the countrys total yield, are now inundated under water of around 70 streams and rivers coming down from Bhutan.Industry experts have estimated the immediate loss as of around Rs 200 Crore. But this time, large scale inundation of garden has caused heavy damage of bushes too,” said planters there. “The ground water contamination keeps on damaging soil hampering production. Read the passage and answer the following questions.Unprecedented rainfall in Himalayan foothills during last couple of days and wide spreadinundationhave once again brought the old Indo-Bhutan trans boundary issue of dolomite contamination of land and its bite on tea economy of Dooars region in northern West Bengal into surface.Flow of water, highly contaminated with dolomite from illegal mines in Bhutan, through rivers in Dooars region in Alipurduar district had always remained a concern for the local tea dependent economy. In conclusion, supersonic speed is defined as a speed greater than the speed of sound in air at sea level, which is approximately 760 miles per hour. For example, the speed of sound is faster in water than in air. It is important to note that the speed of sound is not a constant value and can vary in different mediums. Supersonic speeds are commonly associated with high-performance aircraft such as fighter jets and supersonic transport planes. These shock waves can be heard as a sonic boom when the object passes by. At supersonic speeds, shock waves are formed, which are characterized by a sudden increase in pressure and temperature. When an object travels at supersonic speed, it is traveling faster than the speed at which sound waves propagate in the air. However, for this question, we can assume that the speed of sound is approximately 760 miles per hour. The speed of sound is not a fixed value and varies depending on factors such as temperature, humidity, and altitude. The speed of sound in air at sea level is approximately 760 miles per hour. Supersonic speed is defined as any speed that exceeds the speed of sound. In this case, the correct answer is option 'A', which states that supersonic speed is around 760 miles/hour. Only time will tell if they are able to realize their vision for the future of mass transit.Supersonic speed refers to the speed that is greater than the speed of sound in air at sea level. This project marks Korea’s biggest effort yet focused on developing futuristic transportation technology. Magnetic levitation (maglev) trains, which are the fastest form of ground transport, can only go about half that speed due to air resistance, which slows the train down as it picks up speed. Theoretically, this will allow the train to go as fast as 1,000 km/h (621 mph). These super-fast speeds are possible because the technology eliminates friction and air resistance by suspending pods inside tubes in a partial vacuum. Should they succeed, the train would easily shuttle passengers from Seoul to Busan in just 30 minutes (current travel time is 50 minutes by plane or five hours by traditional rail). The statement was made by the Korea Railroad Research Institute (KRRI), who will be working with Hanyang University and other research teams to bring the technology to fruition.
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