Question

The dimensions of a rectangular water tank are 2 m 75 cm by 1 m 80 cm by 1 m 40 cm. How many litres of water does it hold when filled to the brim?

Answer 1

$1m=100cm$
Therefore, dimensions of the tank are:
$2m75cm\times 1m80cm\times 1m40cm=275cm\times 180cm\times 140cm$
∴ Volume = $\mathrm{Length}\times \mathrm{Breadth}\times \mathrm{Height}=275\times 180\times 140=6930000{\mathrm{cm}}^3$

Also, $1000c{m}^3=1L$

∴ Volume $=\frac{6930000}{1000}=6930L$