Find the total amount paid by Ravindra if he purchased the following items :
The cost of 2 kg of apples and 1 kg of grapes on a day was found to be Rs. 160. The cost of 4 kg of apples and 3 kg of grapes is Rs. 360. Find the cost of per kg apples and grapes.
A food item contains flour and sugar. The ratio of flour and sugar is 7:5 and the total quantity of the food item is 48 kgs.
If the quantity of food item is doubled, find the amount of flour present in the overall food now.