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#### 4200
A rectangular swimming pool is 20 meters long, 10 meters wide, and 2 meters deep. How many cubic meters of water does it hold?
Volume = 20 à 10 à 2 = <<20 à 10 à 2 = 400>>400 m³.
A bakery sells cupcakes in boxes of 12. If they bake 360 cupcakes, how many boxes do they fill, and how many cupcakes are left over?
Number of full boxes = 360 ÷ 12 = <<360 ÷ 12 = 30>>30.
Cupcakes left over = 360 â (30 Ã 12) = <<360 â 360 = 0>>0.
#### 30 boxes, 0 left over
A train leaves Station A at 80 km/h. Another train leaves Station B, heading toward Station A at 100 km/h. The stations are 540 km apart. How long until the trains meet?
Relative speed = 80 + 100 = <<80 + 100 = 180>>180 km/h.
Time to meet = 540 ÷ 180 = <<540 ÷ 180 = 3>>3 hours.