Question

1) जर केळ्यांचा भाव प्रति डझन 1 ने वाढवला, तर 840 ना पूर्वीपेक्षा दोन डझन केळी कमी मिळतात, तर सुरूवातीचा केळ्यांचा
प्रति डझन भाव काढा.​

Answer 1

Answer:

steps by steps solution plz

Answer 2

Answer:

The original cost of one dozen of banana is Rs 20

Step-by-step explanation:

Given;

let x be the original prize of bananas per dozen ,

the amount given in the cost of all bananas are Rs 840

at the given prize we got $\frac{840}{x}$ dozen of bananas,

there is a increase in price of 1 for dozen that is  Rs x+1 per dozen

to find:

find the original cost of  one dozen of banana

procedure:

after increasing the price the new number of dozens of bananas are $\frac{840}{x+1}$

according to the equation ,

=> $\frac{840}{x} -\frac{840}{x+1}$ = 2

(common out 840)

=> $840(\frac{1}{x} -\frac{1}{x+1} )$ = 2

=>  $840 (\frac{x+1-x}{x(x+1)}) = 2$

=>  $840( \frac{1}{x+x^{2} } )=2$

=> $840 = 2(x^{2} +x)$

=> $2x^{2} +2x-840=0$

divide by 2 and send 2 to other side

=>$x^{2} +x-420=0$

=> $x^{2} -20x+21x-420=0$

=> x = 20 or x = -21

price cannot be negative,

so the value of x will be Rs.20

the original cost of one dozen of banana is Rs 20

for more such questions:

https://brainly.in/question/49547411

#SPJ2