Electricity blackout

On Tuesday at 6 o'clock, the electricity supply was interrupted at 156 h. On which day (1 = Monday, ... 7 = Sunday) and at what time was the electricity supply resumed?

Final Answer:

d =  1
t =  18

Step-by-step explanation:

$$\begin{gathered} h=156+6=162\text{h} \\ {n}_1=\lfloor h/24\rfloor =\lfloor 162/24\rfloor =6\text{d} \\ {d}_1=n_1+2=6+2=8 \\ d=d_1-7=8-7=1 \end{gathered}$$

$t=h-n_1\cdot 24=162-6\cdot 24=18$

Try another example