A Certain Type Of Mixture Is Prepared By Mixing Brand A At Rs.9 A Kg.

1.	A Certain Type Of Mixture Is Prepared By Mixing Brand A At Rs.9 A Kg. With Brand B At Rs.4 A Kg. If The Mixture Is Worth Rs.7 A Kg., How Many Kgs. Brand A Are Needed To Make 40kgs. Of The Mixture?
Answer» A + B = 40. And at Rs 7 a kg for 40 kg, you want a total of Rs.280. So the second equation is 9A + 4B = 280 From the first equation: B = 40 - A and SUB into the second equation: 9A + 4(40-A) = 280 9A + 160 - 4A = 280 5A = 120 A = 24. Your answer, of course, is A = 24. A + B = 40. And at Rs 7 a kg for 40 kg, you want a total of Rs.280. So the second equation is 9A + 4B = 280 From the first equation: B = 40 - A and sub into the second equation: 9A + 4(40-A) = 280 9A + 160 - 4A = 280 5A = 120 A = 24. Your answer, of course, is A = 24.

A Certain Type Of Mixture Is Prepared By Mixing Brand A At Rs.9 A Kg. With Brand B At Rs.4 A Kg. If The Mixture Is Worth Rs.7 A Kg., How Many Kgs. Brand A Are Needed To Make 40kgs. Of The Mixture?

Answer»

A + B = 40.

And at Rs 7 a kg for 40 kg, you want a total of Rs.280.

So the second equation is 9A + 4B = 280

From the first equation: B = 40 - A

and SUB into the second equation:

9A + 4(40-A) = 280

9A + 160 - 4A = 280

5A = 120

A = 24.

Your answer, of course, is A = 24.