The density of a substance is `400kgm^(-3)` and that of another substance is `600kgm^(-3)` . The heat capacity of `40c c` of first substance is equal to that of `30c c` of second substance. The ratio of their specific heats is

Options

A. `1:6`
B. `6:1`
C. `9:8`
D. `8:9`

Answer

C

Explanation

`C=(1)/(m)(dQ)/(dT)implies(C_(1))/(C_(2))=(m_(2))/(m_(1)),(C_(1))/(C_(2))=(V_(2)d_(2))/(V_(1)d_(1))`