Question
Speed of a boat in downstream is 50% more than that in
upstream. Total time to travel 48 km upstream and 36 km downstream is 6 hours. What is the speed of boat in downstream?Solution
Speed of a boat in downstream = 150/100 × Speed of a boat in upstream DS : US = 3x : 2x According to question, => 48/2x + 36/3x = 6 => 144 + 72 = 36x => x = 6 Speed of a boat in downstream = 3x = 3 × 6 = 18 km/hr
A series LCR circuit has a resistor of 100 Ω. At resonance, the voltage across the resistor is 50 V and across the inductor is 30 V. If the angular re...
The book ‘Fungi and Plant Diseases’ was written by:
A body of mass 6 kg accelerates from 6 m/s to 18 m/s in 3 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).
Which element is the constituent of the chlorophyll molecule?
Which of the following disease affects the brain of a person?
What is the function of the liver in the human body?
Which of the following is the ratio of Oxygen to Nitrogen in the air?
Which of the following statements for the given chemical reaction is true?
Fe₂ O₃ + 2Al → Al₂ O₃ + 2Fe
When a forward bias is applied to a p-n junction, it
After rising a short distance the smooth column of smoke from a cigarette breaks up into an irregular and random pattern. In a similar fashion, a stream...
Relevant for Exams:
