Wheat costing Rs. 42 and Rs. 36 per kg is mixed with third variety in the ratio 3:4:5. If this mixtu

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26 Oct 2022 Ratio and Proportion

Wheat costing Rs. 42 and Rs. 36 per kg is mixed with third variety in the ratio 3:4:5. If this mixture cost Rs. 46.5 per kg, then per kg price of wheat of third variety is:

OPtion

1) 47.6
2) 56.4
3) 49.8
4) 57.6
5) 55.4
6) 54.6
7) 52.2
8) 54.4
9) 54.2
10) None of these

Solution

Let the quantity of 1st, 2nd and 3rd variety be 3 kg, 4 kg and 5 kg respectively, then total quantity=12 kg
Let the cost of 3rd variety be Rs x/kg, then Avg. cost of final mixture = (3*42 + 4*36 + 5*x) / 12 = 46.5
270 + 5x = 558
5x = 288
x = 57.6
Correct Option 4)

Correct Option: 4 Best Solution (3)

G.S.Kantharao   2 years AGO

3*42+4*36=126+144=270
Total 46.5*12=558
Diff=558-270=288
Cost of third=288/5=₹57.6
My option is 4👈

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RAMADURAI NATESAN   2 years AGO

let quantities.price of 3 varieties be 3x , 4x and 5x.
let price of 3rd variety be c . per kg price of mixture
=( 3x*42 + 4x*36 + 5x*c ) /12x = 46.5.
solving , c =57.6

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AAKASH RAWAT   2 years AGO

Acc to ques .
3/12 of wheat costing 42 = 21/2
4/12 of wheat costing 36 = 12
5/12 of third variety costing(say x)
21/2 + 12 + (5/12)x = 46.5
x = 57.6

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