Question

¼litre of milk cost Rs 20 how much would 6½litres of milk cost

Answer 1

¼litre of milk cost Rs 20
1 litre of milk cost ₹ 20*4/1 = ₹80
6½litres = 13/2 lt of milk cost = 80*(13/2)
= 40*13 = ₹ 520

Answer 2

Hey there!

Given,

Cost of 1/4 litres of milk= 20

Let the cost of 6½ ( 13/2) litres = x.

They follow a direct variation.


1/4 / 20 = 13/2 / x

x/4 = 13/2 * 20

x/4 = 13 * 10

x/4 = 13 * 10

x = 130 * 4

x =520 .

Therefore, Cost of 6½litres is 520 rupees.