Mathematics, 25.05.2021 17:00 neyssa83
saudara X dan saudara Y , bila bekerja bersama , habis memasang jubin lantai sebuah bilik dalam masa 6 hari . bila saudara X bekerja sendiri , dia mengambil masa 5 hari kurang daripada saudara Y yang bekerja sendiri . Berapa lama saudara X dan saudara Y ambil untuk menghabiskan kerja ini sendiri tanpa bantuan
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saudara X dan saudara Y , bila bekerja bersama , habis memasang jubin lantai sebuah bilik dalam masa...
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