Question

A dozen banana cost rs 20 what is the cost of 30 banana ?​

Answer 1

A dozen banana cost Rs. 20.

That means 12 bananas cost Rs. 20.

So, the cost of 1 banana is 20/12 which is Rs. 5/3.

We need to find out the cost of 30 bananas now.

So, we need to multiply the cost of 1 banana with 30 to have the answer of this question.

Steps:

Rs. 5/3 × 30 = Rs. 5 × 10 = Rs. 50

Answer:

The cost of 30 bananas is Rs. 50.

Answer 2

$\huge\mathbb\pink{GIVEN:}$

${\bold{\mathcal\red{Cost\:of\:a\:dozen\:banana=20}}}$

That is , 12 bananas cost Rs .20 .

Here we are asked to find the cost of 30 bananas .

Let's find the cost of 1 banana :

$\dfrac{20}{12}$=$\dfrac{5}{3}$

Cost of 1 banana = $\dfrac{5}{3}$

$\dfrac{5}{3}×30=50$

Hence , the cost of 30 bananas =50