### 35 kg of type A sandal powder, which costs Rs. 614 per kg, was mixed with a certain amount of type B sandal powder, which costs Rs. 695 per kg. Then the mixture was sold at the rate of Rs. 767 per kg and 18% profit was earned. What was the amount (in kg) of type B sandal powder in the mixture ?

A. 24 kg B. 28 kg C. 32 kg D. 36 kg Answer: Option B
\begin{aligned}&\text{Cost price of mixture}\\ &=\frac{\text{ Sale price }}{(100+\text{ gain }\%)}\times100\\ &=\frac{767}{118}\times100\\ &=\text{ Rs. }650\end{aligned} $\begin{array}{l}\text{Ratio = 5 : 4}\\ \text{∴ Quantity of A type of sandal is 35 kg}\\ \text{∴ 5x = 35 kg}\\ \text{∴ x = 7 kg}\\ \text{Thus B type sandal}\\ \text{= 7 × 4 = 28 kg}\end{array}$