Question

A mixture consists of 45% sand, 36% gravel and rest cement. Find the
weight of the mixture which contains 22.5 kg of sand. Also determine the
weight of mixture that will contain 3.8 kg of cement

Answer 1

Answer:

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Answer 2

Answer:

hi

Step-by-step explanation:

Let the mixture be 100%

Quantity of sand in the mixture =  

11

500

​

%

Quantity of gravel in the mixture =  

11

400

​

%

Quantity of Cement in the mixture =100%−  

11

500

​

%−  

11

400

​

%

⇒  

11

1100÷500−400

​

%

⇒  

11

200

​

%

Let xKg of mixture contain 12.5Kg of sand

But 100% of mixture contains  

11

500

​

% of sand

⇒  

100%

x

​

=  

11

500

​

%

12.5

​

 

⇒x=  

500%

12.5×100%

​

×11Kg

=2.5×11kg

=27.5Kg

let yKg of mixture contain 4Kg of cement

But 100% of mixture contain  

11

200

​

% discount

⇒  

100%

y

​

=  

11

200

​

%

4

​

 

y=22Kg