Question

explain pls pls pls pls pls pls pls​

Answer 1

The answer is : C.

as we know, heat travels from a hot body to a cold body when they both are in direct contact but this continues only until BOTH BODIES REACH THE SAME TEMPERATURE. so block one being at a higher temperature gives it heat to the block two who absorbs it..block one reducing its temperature and block two increasing

When both the bodies attain the same temperature there is no futher loss  or gain of heat and hence temperature remains constant - 30 degrees