Question

Derek uses a 136 cm flat steel bar that weighs 4 kg to make rack in the garage. Determine the weight of a 170 cm steel bar

Answer 1

The weight of a 170 cm steel bar will be 5 Kg

Explanation:

Derek uses a 136 cm flat steel bar that weighs 4 kg to make rack in the garage.

1 kg = 1000 gm

So the weight of 1 cm steel bar will be
`(4 )/(136)` kg

Weight of 1 cm bar =
`(4000)/(136)` gm

Let the weight of a 170 cm steel bar will be
`(4000 )/(136)` ×
`170` gm

⇒
`4000` ×
`1.25` gm

⇒ 5000 gm

⇒5 kg

Hence, the weight of a 170 cm steel bar will be 5 Kg