The seconds pendulum of a certain clock has time period 2.04s. How fast or slow does the clock run during 24 hour?

$\mathrm{A} \mathrm{seconds} \mathrm{pendulum} beats 43200 \mathrm{oscillations} \mathrm{per} \mathrm{day}$

$\mathrm{if} \mathrm{each} \mathrm{oscillation} \mathrm{it} \mathrm{takes} 2.04 \sec \mathrm{then} \mathrm{total} \mathrm{time} \mathrm{T}\text{'}=88128\sec$

$∆\mathrm{T}={\mathrm{T}}^{\text{'}}-\mathrm{T}=88128-86400=1728 \sec =28.8 \mathrm{minute} \mathrm{slow}.$