Question

3. How many pieces of cardboard, each 0.005 m thick are there in a
pile of 3.5 m thickness?​

Answer 1

We have been given the amount of thickness one cardboard will have and asked to find the number of card boards required to make 3.5m thick .

For this we can use two methods :

1. Variation
2. Direct Division

|| ★ || Variation || ★ ||

0.005m = 1

3.5 = ?

Here if the number of cardboard increases the height will increase and decrease vice versa . So it's a direct type of variation .

We just need to cross multiply :

0.005 1

X

3.5 ?

3.5 × 1 / 0.005

3.5/0.005

➜ 700

So 700 pieces of cardborad is required .

|| ★ || Direct Division || ★ ||

3.5/0.005

350/0.5

➜ 700

Answer 2

Given

• Each have 0.005 m thick

We Find

• pieces of cardboard

We Doing

Simple methods as "3.5 / 0.005 m"

According to the question

= 3.5 / 0.005

= 350/0.5

= 700

So, Answer is 700