how much sand is required to fill a swimming pool 20m long and 8m deep

depends on how wide it is.

then recall that volume is length*width*depth

its 20m wide ,8m deep

You mean 20208 - 3200 m^3 ?

yes

To calculate the amount of sand required to fill a swimming pool, you need to know the dimensions of the pool and the desired depth of the sand layer. In this case, the length of the pool is given as 20 meters and the depth is given as 8 meters.

To calculate the volume of sand needed, you can use the formula:

Volume = Length × Width × Depth

Since the width of the pool is not provided, I will assume a standard width of 4 meters. However, please note that the width may vary depending on the specific shape of the pool.

Let's calculate:

Volume = 20m × 4m × 8m
Volume = 640 cubic meters

Therefore, 640 cubic meters of sand would be required to fill a swimming pool that is 20 meters long, 4 meters wide, and 8 meters deep. Keep in mind that this estimation assumes a rectangular pool with a width of 4 meters. If the pool has a different shape or width, the amount of sand required may vary.