Length = 2.1m breadth = 1.5m (given) We know volume of the cuboid = Length x breadth x height ∴ Rise in water is given by, Length x breadth x height = 630 litres (or)
630
1000
m3 2.1 x 1.5 x h =
630
1000
⇒h=(
63
100
)(
10
21
)(
10
15
) ⇒ h = 0.2 m Hence, option D is the correct answer.