A rectangular container measures 20cm long, 30cm wide and 40cm high. Calculate its volume in litres.

Question 19: A rectangular container measures 20cm long, 30cm wide and 40cm high. Calculate its volume in litres. Step 1: Calculate the volume in cubic centimeters. The volume of a rectangular container is given by the formula V = length × width × height. V = 20\, cm × 30\, cm × 40\, cm V = 24000\, cm^3 Step 2: Convert the volume from cubic centimeters to litres. We know that 1\, L = 1000\, cm^3. V = 24000\, cm^31000\, cm^3/L V = 24\, L The correct option is (a). The volume of the container is 24 L. Question 20: A cyclist used 7 hours to cover a distance of 560km. Find his average speed. Step 1: Use the formula for average speed. Average speed is calculated as Speed = DistanceTime. Speed = 560\, km7\, hours Step 2: Calculate the average speed. Speed = 80\, km/h The correct option is (b). The cyclist's average speed is 80 km/h. Question 21: A rectangular tank has a length of 12cm, a breadth of 80cm, and a height of 50cm respectively. What is the volume of water in the tank when it is full? Step 1: Calculate the volume of the rectangular tank. The volume of a rectangular tank is given by the formula V = length × breadth × height. V = 12\, cm × 80\, cm × 50\, cm Step 2: Perform the multiplication. V = 48000\, cm^3 None of the options (a) 982 cm³, (b) 582 cm³, (c) 672 cm³, (d) 472 cm³ match the calculated volume. There might be a typo in the question or options provided in the image. Assuming the question asks for the volume with the given dimensions, the calculated volume is 48000\, cm^3. If the question intended to ask for volume in litres, it would be 48\, L. Given the options are in cm³, the calculated value does not match. I will provide the calculated answer. The volume of water in the tank when it is full is 48000 cm^3. Question 22: A motorist whose average speed was 56 km/h, covered a distance of 448 km. Find the time taken. Step 1: Use the formula for time. Time is calculated as Time = DistanceSpeed. Time = 448\, km56\, km/h Step 2: Calculate the time taken. Time = 8\, hours The correct option is (b). The time taken is 8 hours. Question 23: How many weeks are in 364 days? Step 1: Divide the total number of days by the number of days in a week. There are 7 days in a week. Number of weeks = 364\, days7\, days/week Step 2: Perform the division. Number of weeks = 52\, weeks The correct option is (d). There are 52 weeks in 364 days. Question 24: Find the sum of 23.8, 49.72 and 189.77. Step 1: Align the decimal points and add the numbers. 23.80 49.72 + 189.77 263.29 The correct option is (a). The sum is 263.29. Question 25: Simplify: sqrt(64) + 49sqrt(36) + sqrt(144) - 81sqrt(16) Step 1: Calculate the square roots. sqrt(64) = 8 sqrt(36) = 6 sqrt(144) = 12 sqrt(16) = 4 Step 2: Substitute the square root values into the expression. (8 + 49)/(6) + (12 - 81)/(4) Step 3: Perform the addition and subtraction in the numerators. (57)/(6) + (-69)/(4) Step 4: Convert the fractions to decimals or find a common denominator. (57)/(6) = 9.5 (-69)/(4) = -17.25 Step 5: Add the two results. 9.5 + (-17.25) = 9.5 - 17.25 = -7.75 The options provided are (a) 9, (b) 10, (c) 8. None of these match -7.75. Let me re-check the problem statement. It seems there might be a typo in the question or options. Assuming the calculation is correct based on the written expression. The simplified value is -7.75. Question 26: Jide bought a textbook for N800 and later sold it to Effiom at a profit of 25%. Effiom sold it at a profit of 25% to Arieta. How much did Arieta bought the book from Effiom? Step 1: Calculate the price Jide sold the book to Effiom. Jide's cost price = N800. Profit = 25% of N800 = 0.25 × 800 = N200. Jide's selling price to Effiom = N800 + N200 = N1000. Step 2: Calculate the price Effiom sold the book to Arieta. Effiom's cost price = N1000 (Jide's selling price). Profit = 25% of N1000 = 0.25 × 1000 = N250. Effiom's selling price to Arieta = N1000 + N250 = N1250. None of the options (a) N1300, (b) N1200, (c) N1100, (d) N1800 match the calculated value. I will provide the calculated answer. Arieta bought the book from Effiom for N1250. Question 27: A man is on a 2 hours journey, he starts the journey by 8:30 a.m. When will he end his journey? Step 1: Add the duration of the journey to the start time. Start time = 8:30 a.m. Journey duration = 2 hours. Step 2: Calculate the end time. 8:30 a.m. + 2 hours = 10:30 a.m. The correct option is (d). He will end his journey at 10:30 a.m.. Question 28: In a class of 40 pupils, 30% of them like rice. How many pupils do not like rice? Step 1: Calculate the percentage of pupils who do not like rice. Total percentage = 100%. Percentage who like rice = 30%. Percentage who do not like rice = 100\% - 30\% = 70\%. Step 2: Calculate the number of pupils who do not like rice. Number of pupils who do not like rice = 70% of 40. 0.70 × 40 = 28 The correct option is (c). 28 pupils do not like rice. Question 29: How many days are there in the months of January, April, September, and December? Step 1: List the number of days for each specified month. • January: 31 days • April: 30 days • September: 30 days • December: 31 days Step 2: Sum the number of days. 31 + 30 + 30 + 31 = 122\, days None of the options (a) 143 days, (b) 183 days, (c) 153 days match the calculated value. I will provide the calculated answer. There are 122 days in the months of January, April, September, and December. Send me the next one 📸