Get Started with ixamBee
Start learning 50% faster. Sign in now
Speed of the boat in still water = 120 ÷ 4.8 = 25km/h Let the speed of the stream be 'x' km/h. ATQ. {20/ (25 - x)} + {15/(25 + x)} = (3/2) Or {20 X (25 + x) + 15 X (25 - x)} = (3/2) X (25 +x) X (25 - x) Or {(500 + 20x + 375 - 15x) X 2} = 3 X (625 -x²) Or, 1750 + 10x = 1875 - 3x² Or 3x² + 10x - 125 = 0 Or 3x² + 25x -15x - 125 = 0 Or x (3x + 25) - 5(3x + 25) = 0 Or (x - 5) (3x + 25) = 0 So, x = 5 or x = -(25/3) Since the speed of the stream cannot be negative therefore, speed of stream =5km/h so required time =D/s= 32/5 =6.4hours
In the question given below, two phrases in a sentence are highlighted which may or may not be correctly used. From the given choices choose the corre...
The more money the governments pored into it, the harder it was to walk away.
...Select the incorrectly spelt word
In the question below, a sentence is given with one blank, followed by five options, each having two words which may or may not fit in the blank. From ...
The new restaurant on Main Street is cheap than the old one.
From the options given below, select the option which states the correct combination of correct sentences.
I) The project was completed successfu...
Select the option that contains all correctly spelt
The company's new product don't meet the customers' expectations , leading to a significant drop in sales.
...In each of the questions given below, four words are given in bold. These four words may or may not be in their correct position. The sentence is then ...
Select the phrase from the options below that should replace the underlined phrase in the sentence to make it grammatically and contextually correct. I...
