Question

Find that hight of the wall whose length 4m and which can be covered by 2400 tile of a size 25 cm by 20 cm

Answer 1

area of 1 tile=25×20=500 cm²
area of 2400 tile =2400×500
l=4 m=400 cm
l×h=2400×500
h=2400×500/400=3000 cm=30 m