There are 500 learners in a school. Lunch time each learner takes one cup of tea. If the cup holds 50 cL, what is the volume of tea taken throughout the whole school in cm³?

Okay Placide, let's tackle these problems. Problem 4: There are 500 learners in a school. Lunch time each learner takes one cup of tea. If the cup holds 50 cL, what is the volume of tea taken throughout the whole school in cm³? Step 1: Calculate the total volume of tea in centilitres (cL). Each learner takes 50 cL, and there are 500 learners. Total volume in cL = 500 learners × 50 cL/learner Total volume in cL = 25000 cL Step 2: Convert the total volume from centilitres (cL) to litres (L). We know that 1 L = 100 cL. Total volume in L = 25000 cL100 cL/L Total volume in L = 250 L Step 3: Convert the total volume from litres (L) to cubic centimetres (cm³). We know that 1 L = 1000 cm^3. Total volume in cm^3 = 250 L × 1000 cm^3/L Total volume in cm^3 = 250000 cm^3 The volume of tea taken throughout the whole school is 250000 cm^3. Problem 5: How many cubic centimetres make up a litre? This is a standard conversion factor. 1 litre = 1000 cubic centimetres 1000 cm^3 make up a litre. Problem 6: 5 jerrycans full of water weigh 109 kg. Each of the empty jerrycans weighs 1,800 g. (The question is incomplete, but based on similar problems, we will find the mass of water in one jerrycan and its volume, and the mass of one full jerrycan.) Step 1: Convert the mass of one empty jerrycan from grams (g) to kilograms (kg). We know that 1 kg = 1000 g. Mass of one empty jerrycan = 1800 g × 1 kg1000 g Mass of one empty jerrycan = 1.8 kg Step 2: Calculate the total mass of 5 empty jerrycans. Total mass of empty jerrycans = 5 × 1.8 kg Total mass of empty jerrycans = 9 kg Step 3: Calculate the total mass of water in 5 jerrycans. Total mass of water = Mass of 5 full jerrycans - Mass of 5 empty jerrycans Total mass of water = 109 kg - 9 kg Total mass of water = 100 kg Step 4: Calculate the mass of water in one jerrycan. Mass of water per jerrycan = 100 kg5 Mass of water per jerrycan = 20 kg Step 5: Calculate the volume of water in one jerrycan. Assuming the density of water is 1 kg/L: Volume of water per jerrycan = 20 kg × 1 L1 kg Volume of water per jerrycan = 20 L Step 6: Calculate the mass of one full jerrycan. Mass of one full jerrycan = Mass of one empty jerrycan + Mass of water per jerrycan Mass of one full jerrycan = 1.8 kg + 20 kg Mass of one full jerrycan = 21.8 kg For problem 6: Mass of water in one jerrycan: 20 kg Volume of water in one jerrycan: 20 L Mass of one full jerrycan: 21.8 kg That's 2 down. 3 left today — send the next one.