Question

HOW MANY KILOGRAMS OF BUTTER WORTH RS 140 PER KG MUST BE MIXED WITH 20 KG OF BUTTER WORTH RS 140 PER KG TO PRODUCE A MIXTURE WORTH RS 144 PER KG?

Answer 1

COST OF 1000 G=140 RUPEES
COST OF 20000 G=20 * 140
                           =2800 RUPEES
FOR 140 RUPEES=07.142 G
FOR 1 RUPEES=O.O51 G
IF 1 RUPEES=0.051 G
THEN 4 RUPEES= 4 * 0.051
                            =0.204 G
THEN BUTTER ADDED=20000 G +0.204G
                                       =20000.204 G
                                       =20.000204 G

Answer 2

Answer:

30 kilograms

Step-by-step explanation:

Let the kilogram of butter be "x"

⇒ So, Kilogram of butter Rs. 140/kg = "140x"

⇒ Now we multiply 20kg kg butter worth Rs. 150/kg = "3000"

⇒ Now, for the mixture it will be: 144 (x + 20)

∴ Equation ⇒ 144(x+20) = 140x + 3000  

⇒ 144x + 2880 = 140x + 3000  

⇒ 144x - 140x = 3000 - 2880

⇒ 4x = 120x

⇒ x = 120/4

∴ x = 30 kg

Hence, 30kg of butter worths Rs.140

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