Shania o tlhama mosese wa gagwe, mme o swetsa go o lelefatsa ka go oketsa boleele jwa ona ka 50% ya boleele jwa ona jwa ntlha. O boela a oketsa 20cm kwa tlase ga mosese ka leise. Fa mosese o sena go dirwa o le 140cm, o ne o le boleele jo bo kana kang, ka di-centimeter, pele ga a o lelefatsa?

The elevator in Jack's building supports a maximum load of 700 kg. An adult weighs an average of 80 kg. If Jack rides the elevator with 8 other adults, by how much will they have exceeded the maximum load of the elevator?
Kantle ga leise, boleele jwa mosese ke 140cm - 20cm ya leise = <<140-20=120>>120cm.
A re re re boleele jwa ntlha jwa mosese ke x cm.
Sephatlo sa boleele jwa ntlha ke x/2.
Fa re kopanya boleele jwa ntlha le boleele jo bo okeditsweng, e leng x+x/2 = 120
3/2x = 120
Boleele jwa ntlha ke x= 80 cm
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Jack and 8 other adults form a total of 8 adults + 1 adult = <<8+1=9>>9 adults.
In total, the 9 adults together weigh 9 adults * 80 kg/adult = <<9*80=720>>720 kg.
They have exceeded the maximum load of the elevator by 720 kg - 700 kg = <<720-700=20>>20 kg.
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