Question

a verandah is 40 m long and 15m broad it is to be paved with stones each measuring 6 cm by 5 dm find the number of stones required

Answer 1

dimention of verandah                dimention of each stone
l=40m       b=15m                               l=6 cm  b=5cm
=4000cm     =1500 cm 

number of stones required
=area of the verandah / area of each stone
=4000*1500/6*5
200000  tiles