46. Luciano mora em um sítio e, em conjunto com ou- tros dois vizinhos, construiu uma cisterna com capa- cidade para armazenar 220800 L . Se essa cisterna está com metade de sua capacidade total, e conside- rando que o gasto médio diário total é de 800 L , por quantos dias essa cisterna poderá suprir o consumo desses três vizinhos sem que haja reabastecimento?

4. Malt and Lionel left their houses at the same time and drove in they respective cars to the city which was 200 km away. When Matt reached the city. Lionel still had 50 km more to travel. Lionel finally completed the journey 36 minutes later. How long did Lionel take to drive to the city?

A ladder has 50 rungs. The bottom rung is 1 m long. Each rung is \( 12,5 \mathrm{~mm} \) shorter than the rung beneath it. Determine the total length of wood required to make 50 rungs.

RESOLVER 4) \( \frac{20}{8} \cdot \frac{4}{3}:\left(-\frac{5}{6}\right)= \)

e) \( 1 \frac{1}{3}+2 \frac{1}{4}-3 \frac{5}{12} \)

83 Найдите произведение: \( \begin{array}{l}\text { а) } \frac{4}{9} \cdot \frac{9}{7} \cdot \frac{7}{17} \cdot \frac{17}{28} ;\end{array} \)