Given:
Quantity of rice = 331 kg = 310 kg
Cost per kg = ₹ 4021 = ₹ 281
Cost of 331 kg of rice = ?
Cost of 331 kg of rice = (Quantity of rice) x (Cost per kg)
Substituting the values in above, we get:
Cost of 331 kg of rice = 310 kg x ₹ 281
=₹310×281=₹15×127=₹1×15×27=₹1135=₹135
Hence, the cost of 331 kg of rice is ₹ 135.