Question
The speed of a boat in calm water is 4 km/hr greater
than the speed of the stream. The boat travels a distance of 280 km downstream and 200 km upstream in a total of 70 hours. What is the boat's speed while moving downstream?Solution
Let the speed of the boat in still water and speed of stream be 'x' km/hr and 'y' km/hr respectively. Given, (x - y) = 4 km/hr ATQ, {280 ÷ (x + y) } + {200 ÷ (x - y) } = 70 Or, {280 ÷ (x + y) } + {200/4} = 70 Or, {280 ÷ (x + y) } + 50 = 70 Or, {280 ÷ (x + y) } = 70 - 50 Or, {280 ÷ (x + y) } = 20 So, (x + y) = 14 Therefore, downstream speed of the boat = (x + y) = 14 km/hr
Urea contains:Â
This species considered one of the parents for Korean hybrids in Chrysanthemum breeding is
The 12th edition of Ex Ekuverin a bilateral joint military exercise between Indian army and Maldives National Force Commenced at________
Indian institute of millet research, to be supported as the centre of excellence for ‘shree anna’ located in_____
Which hormone is responsible for the letdown of milk?
The period between ecdyses are the stages called _____ in insectsÂ
Which of the following statement is incorrect about tropic and nastic movements in plant?Â
Which nutrient is regarded essential for protein synthesis in plant cells ?
Which germ layer gives rise to the foregut in insects?
 Among the following, which is the maximum selling agriculture commodity in approximate numbers through e-NAM?
Relevant for Exams:
