A metal ball of mass 0.1kg is heated upto 500˚C and dropped into a vessel of heat capacity 800 J⁻¹ and containing 0.5 kg water. The initial temperature of water and vessel is 30˚C. What is the approximate percentage increment in the temperature of the water? [Specific Heat Capacities of water and metal are, respectively, 4200 Jkg⁻¹K⁻¹ and 400 JKg⁻¹K⁻¹]
A. 30%
B. 20%
C. 25%
D. 15%