Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
A bar of steel weighs twice the mass of a bar of tin. If a steel bar also weighs 20 kgs more than a copper bar and a copper bar weighs 90 kgs, calculate the total weight of a container with 20 bars of each type of metal.

### Response:
 Uzito jumla wa baa 20 za shaba ni 20*90 = 1800 kgs
Kwa kuwa bar ya chuma ina uzito wa kgs 20 zaidi ya bar ya shaba, ina uzito wa 90+20 = 110 kgs
Uzito jumla wa baa 20 za chuma ni 20*110 = 2200 kgs
Bar ya chuma ina uzito mara mbili ya bar ya bati, maana bar ya bati ina uzito wa 110/2 = 55 kgs
Baa 20 za bati zitakuwa na uzito wa 55*20 = 1100 kgs
Uzito jumla wa baa 20 za kila aina ya metali ni 1100+2200+1800 = 5100 kgs