7 kg of rice costs ₹ 1,120. How much rice can be bought for ₹ 3,680?

Let x kg rice cost ₹ 3,680.

Since it is a case of direct variation,

$\therefore \dfrac{7}{1,120} = \dfrac{x}{3,680}\\[1em] \Rightarrow x = \dfrac{7 \times 3,680}{1,120}\\[1em] \Rightarrow x = \dfrac{25,760}{1,120}\\[1em] \Rightarrow x = 23$

Hence, the 23 kg of rice can be bought for ₹ 3,680.