Let the speed of stream be ‘x’ km/hr. So, speed of boat in still water = 7 × x = 7x km/hr Downstream speed of boat = 7x + x = 8x km/hr According to question; 8x = 144/9 = 16 Or, x = 2 Upstream speed of the boat = 7x – x = 6x = 6 × 2 = 12 km/hr Required time taken = 120/12 = 10 hours
What is the outer layer of a dental crown called?
Which of these is considered a non-living part of the cell?
First king to have the image of Buddha incrisbed on his coin?
What is the scientific study of animal behavior known as?
Which gland functions as the body's thermostat?
What is the structural and functional unit of the kidneys?
Which component is incorrectly listed as part of the phloem structure?
Enamel is the hardest part of the human body, primarily protecting which innermost tooth layers?
In genetics, what does the term 'phenotype' refer to?
Which vitamin is produced by the human body when exposed to sunlight?
