Question

( begin{aligned} 25 times 2 frac{3}{4} &=25 times frac{11}{4} &=frac{275}{4} mathrm{cm} &=68 frac{3}{4} mathrm{cm} end{aligned} )

# A total of 25 boards are stacked I on the top of each other. The Thickness of each board is 23 cm How high is the stack 2

Solution