Speed of boat in still water is 7km/hour Let the Speed of Stream be x Km/hour 36/(7+x) + 36/(7-x) = 21 24 = 49- x2 x = 5 km/hour Now, the speed of Boat for the journey from A to B to take time 108 minutes is Speed of boat = y km/hour , Speed of stream = 5km/hour , Time = 108 minutes (y+5) = (36×60)/108 = 20km/hour y+5 = 20 y = 15km/hour ∴ Speed of Boat must be 15km/hour
What is the nature of the pH of milk?
What does Mohs scale measure?
The rate of a reaction depends on:
Which substance is a multibranched polysaccharide of glucose used for energy storage in animals and fungi?
The insecticide gammexane is chemically known as:
The conversion of hard water into soft water by boiling or adding calcium hydroxide is called:
Which of the following fibers will melt when heated?
_____ are a group of chemicals that influence cell division and shoot formation.
Which dating method is commonly used to determine the age of materials from prehistoric times?
Which of the following substances is classified as a carbohydrate?
