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Speed of the boat in still water = 140 ÷ 7 = 20 km/h Speed of current = 20 × 0.35 = 7 km/h Therefore, upstream speed of the boat = 20 – 7 = 13 km/hr Required time taken = 91 ÷ 13 = 7 hours
Which among the following term refers to the commercial rearing of silkworms?
How many moles of carbon dioxide are present in a gas jar containing 1.501 × 1022 molecules of CO₂?
How many major parts does brain has?
When the heavier component in a mixture settles after water is added to it, the process is called _______.
Which one of the following crops enriches nitrogen content in the soil?
Name the largest gland found in human body :
During the fermentation of sugar, the compound which is always formed is…………?
An aircraft can perform aerobatic manoeuvres in a vertical loop because of-
"Tice splitting of different colours of light in a prism is :
Which of the following is not an equation of motion?
