Let the speed of boy in still water be X km/h. And the speed of current = 10 km/h Downstream speed = (X + 10) km/h Upstream speed = (X – 10) km/h Let time be ‘t’ hours. ⇒ [(X + 10) t]/6 = (X – 10) t ⇒ X + 10 = 6X – 60 ⇒ X = 14 km/h Downstream speed = 14 + 10 = 24 km/h Upstream speed = 14 – 10 = 4 km/h
The ______ fight against germs that may enter our body.
Which organ is known as the "Biochemical Laboratory" of the human body?
The amount of water vapors differs from place to place. Its amount is minimum in which of the following places?
Amphibians and many reptiles typically have which type of heart?
Which organelle is responsible for producing ATP in a cell?
What is the term for the rhythmic contraction of the muscle lining of the canal to push food along the gut?
The primary function of RNA is:
What is the primary respiratory pigment in human blood?
Which is the second-largest animal phylum?
Which part of the brain is responsible for actions like thinking, intelligence, memory, and learning?
