Question
A boat travels 40 km downstream in 5 hours, and the same
boat travels 40 km upstream in 8 hours. Find the speed of the boat in still water.ÂSolution
Let the speed of the boat in still water be x km/h, and the speed of the stream be y km/h. Downstream speed = (x + y) km/h, and upstream speed = (x - y) km/h. Downstream: 40 / (x + y) = 5 Upstream: 40 / (x - y) = 8 From the downstream equation: x + y = 40 / 5 = 8. From the upstream equation: x - y = 40 / 8 = 5. Now solve: x + y = 8 x - y = 5 Adding both equations: 2x = 13 x = 6.5 km/h Thus, the speed of the boat in still water is 6.5 km/h.
Which of the following is NOT a principle of organic farming as per IFOAM?
Which WTO agreement addresses the protection of human, animal, and plant health?
Which Indian organization helps exporters meet international food trade requirements and offers infrastructure support?
What is the key environmental benefit of organic farming?
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 ____
What is the full form of SPS in WTO agreements related to agri trade?
Which of the following is a dicotyledonous weed?
What is the main economic advantage of organic farming for smallholders?
Which Ministry governs the functioning of APEDA?
What does the conversion period in organic farming refer to?
