Let Nike take 'x' days to complete. Then Nike's daily production is 810/x and Adidas's daily production is 900/(x-3).
900/(x-3) = 810/x + 21....> 7x^2 - 51x -27*30 =0....> 7x(x-15) + 54(x-15) = 0....> (x-15)(x+54) = 0....> x=15.
Nike's daily production is 810/15 = 54 and Adidas's is 75. ANS: A
The math was a bit complicated since it involved large numbers. Difficult to do in allotted time.
900/(x-3) = 810/x + 21....> 7x^2 - 51x -27*30 =0....> 7x(x-15) + 54(x-15) = 0....> (x-15)(x+54) = 0....> x=15.
Nike's daily production is 810/15 = 54 and Adidas's is 75. ANS: A
The math was a bit complicated since it involved large numbers. Difficult to do in allotted time.
