Question

the cost of 3 litres of milk is 45. find the cost 7 litres of milk.​

Answer 1

Answer:

3 litre = 45

1 litre = 45/3 = 15

7 litre = 45/3 x 7 = 105

Answer 2

Answer:

∴ The cost of $7$ litres of milk is Rs. $105$.

Step-by-step explanation:

In context to question asked,

• We have to find the cost $7$ litres of milk.​
• It is given that the cost of $3$ litres of milk is $45$.
• To find the cost of $7$ litres of milk, we have to first find the cost of one litre of milk.
• So, the cost of one litre of milk = $\frac{45}{3}$

                                            = Rs. $15$

• Now, by multiplying the cost of one litre of milk by $7$, we can find the cost of $7$ litres of milk.​

      ∴ Cost of $7$ litres of milk = Cost of $1$ litre milk $\times$ Number of litres

                                         = $15\times 7$

                                         = Rs. $105$      

• ∴ The cost of $7$ litres of milk is Rs. $105$.