Question

if 1 inch is equal to 2.5 cm then how many inches are in 30 cm​

Answer 1

Answer:

12inch

Step-by-step explanation:

2.5cm=1 inch

2.5*12cm=12inch

30cm=12 inch

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Answer 2

Solution :-

Here given that ,

• 1 inch equal to 2.5 cm ( 1 inch = 2.5 cm)

We need to find ,

• If 1 inch = 2.5 cm then find for 30cm

Let the no. of inches for 30cm be x

Now , using ratio proportion .

• 1 : x : : 2.5 : 30

Now , by means & extremes

⇒ x ( 2.5 ) = 30 × 1

⇒ 5/2 × x = 30

⇒ 5x/2 = 30

⇒ 5x = 30 × 2

⇒ 5x = 60

⇒ x = 60/5

⇒ x = 12 inches

Hence , 12 inches are there in 30cm