Question

A tractor trailer weighs 80,000 pounds. Two tractor trailers come upon a bridge with a sign saying it can only handle 100 tons. How many tons are still available before the bridge reaches its weight limit?

Answer 1

Two tractor trailers would weigh 160,000 pounds, which is equal to 80 tons. 100-80= 20 tons that are still available.

Answer 2

Answer: 20 tons are still available before the bridge reaches its weight limit.

Explanation:

Given: The weight of one tractor = 80,000 pounds

Then, the weight of two tractors =
`2*80,000=160,000\text{ pounds}`

We know that 1 ton = 2,000 pounds

`\Rightarrow\ 1\text{ pound}=(1)/(2000)\text{ton}`

Therefore,
`160,000\text{ pounds}=(160,000)/(2,000)\text{ tons}=80\text{ tons}`

Thus, the weight of two tractors come upon a bridge =80 tons

Since, the limit of bridge to handle the maximum weight of 100 tons.

∴ Number of tons still available before the bridge reaches its weight limit=

`100-80=20\text{ tons}`