If each truck weighs 3.5 tons then the weight of 5 trucks is 3.5 x 5 tons = 17.5 tons.

But, we also know that 1 ton = 2000 lbs, so the weight of 5 trucks is 17.5 x 2000 = 35000 lbs.

**The weight of 5 trucks is 35000 lbs.**

If each truck weighs 3.5 tons then the weight of 5 trucks is 3.5 x 5 tons = 17.5 tons.

But, we also know that 1 ton = 2000 lbs, so the weight of 5 trucks is 17.5 x 2000 = 35000 lbs.

**The weight of 5 trucks is 35000 lbs.**