A block of material of Volume 2 x 10^-5m³ and density 2.5 x 10³kgm is suspended from a spring balance with half the volume of the block immersed in water. What is the reading of the spring-balance? (Density of water = 1.0 x 10^3kgm^-3, g=10ms^-2)

• A.0.10N
• B.0.25N
• C.0.30N
• D.0.40N