Question

One quality of wheat at Rs. 9.30 per kg is mixed with another quality at a certain rate in the ratio 8 : 7. If the mixture so formed be worth Rs. 10 per kg, what is the rate per kg of the second quality of wheat ?

• A. $Rs.10.30$
• B. $Rs.10.60$
• C. $Rs.10.80$
• D. $Rs.11$

Answer 1

The correct option is C $Rs.10.80$

Let the rate of second quality be $xRs.$ per kg

Ratio $=8:7$

$\left(9.30\right)\left(8\right)+\left(8\right)\left(7\right)=$ Total rate of the mixture of $2$ quality wheat

Total no. of kg's $=7+8$ $=15$

$\frac{\left(9.30\right)\left(8\right)+7x}{15}=10$

$7x=75.6$

$x=10.8Rs.$ rate of second quality of wheat.