The document contains 4 word problems about masses of various objects: 1) A durian weighs 900g and a papaya weighs 550g, so the durian is 350g heavier. 2) Sulin weighs 34kg, her brother is 8kg lighter, so he weighs 26kg and together they weigh 60kg. 3) Raju weighs 39kg, his father is 28kg heavier, so his father weighs 67kg and together they weigh 106kg. 4) An apple and pineapple together weigh 840g, the apple weighs 90g, so the pineapple weighs 750g and is 660g heavier.