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

The volume of a rectangular container is given by the formula $V = \text{length} \times \text{width} \times \text{height}$.

We know that $1\, \text{L} = 1000\, \text{cm}^3$.

The correct option is (a).
The volume of the container is $\boxed{\text{24 L}}$.

Average speed is calculated as $\text{Speed} = \frac{\text{Distance}}{\text{Time}}$.

The correct option is (b).
The cyclist's average speed is $\boxed{\text{80 km/h}}$.

The volume of a rectangular tank is given by the formula $V = \text{length} \times \text{breadth} \times \text{height}$.

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 $48000\, \text{cm}^3$. If the question intended to ask for volume in litres, it would be $48\, \text{L}$. 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 $\boxed{\text{48000 cm}^3}$.

Time is calculated as $\text{Time} = \frac{\text{Distance}}{\text{Speed}}$.

The correct option is (b).
The time taken is $\boxed{\text{8 hours}}$.

There are 7 days in a week.

The correct option is (d).
There are $\boxed{\text{52 weeks}}$ in 364 days.

The correct option is (a).
The sum is $\boxed{\text{263.29}}$.

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 $\boxed{\text{-7.75}}$.

Jide's cost price = N800.
Profit = 25% of N800 = $0.25 \times 800 = \text{N}200$.
Jide's selling price to Effiom = N800 + N200 = N1000.

Effiom's cost price = N1000 (Jide's selling price).
Profit = 25% of N1000 = $0.25 \times 1000 = \text{N}250$.
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 $\boxed{\text{N1250}}$.

Start time = 8:30 a.m.
Journey duration = 2 hours.

8:30 a.m. + 2 hours = 10:30 a.m.
The correct option is (d).
He will end his journey at $\boxed{\text{10:30 a.m.}}$.

Total percentage = 100%.
Percentage who like rice = 30%.
Percentage who do not like rice = $100\% - 30\% = 70\%$.

Number of pupils who do not like rice = 70% of 40.

The correct option is (c).
$\boxed{\text{28 pupils}}$ do not like rice.

• January: 31 days
• April: 30 days
• September: 30 days
• December: 31 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 $\boxed{\text{122 days}}$ in the months of January, April, September, and December.