Question

the cost of 1dozen pens is rs24. find the cost of 30 pens​

Answer 1

We know 1 dozen pens = 12 pens

therefore, Cost of 12 pens = 24rs.

,, ,, ,, 1 ,, = 12/24=2rs.

,, ,, ,, 30 ,, = 30 ×2= 60rs.

Answer 2

Answer:

cost of 1dozen pens = 24 rs

1dozen = 12 pieces

which mean, 12 pens = 24 rs

30 pens = ?

let the cost of 30 pens be x.

So , 12×x=24×30

, x = 24×30/12

, x= 2×30

, x= 60

So , cost of 30 pens = 60 rs.