200 is the answer i know this because 40%of 200 is 80
Answer:
95 ; 105
Step-by-step explanation:
Let :
Aanya's time = x
Krish's time = x + 10
Together = 50
Hence
Aanya's rate = 1/x
Krish's rate = 1/(x + 10)
Together rate = 1/50
Hence,
1/x + 1/(x + 10) = 1 / 50
((x + 10) + x) / x(x + 10) = 1/ 50
(2x + 10)/ x² + 10x = 1/50
50(2x + 10) = x² + 10x
100x + 500 = x² + 10x
x² + 10x - 100x - 500 = 0
x² - 90x - 500 = 0
Using the quadratic equation solver :
x = 95.24 ; x = - 5.24
Time can't be negative
Hence, x = 95 (nearest minute)
It takes Aanya 95 minutes Alone a ND
Krishna (95 + 10) = 105 minutes alone
Answer:
the value of x is the answer.
Step-by-step explanation:
ok so say that there is a question that you get and it says 9 (x-2) ok so then you would take the x and replace it with the 9 so then you do (9-2=7 so then you would have x=7
Answer:
i used to know how to do this but i forgot sorry hope someone helps
Step-by-step explanation:
Good Luck!!
