Question

14. How many bricks 20 cm long and 10 cm wide will
be required to pave a floor 20 m long and 10 m
cm or a circle of circumference
a m
wide ?​

Answer 1

Answer:

firstly convert meter into centimeters

that is 10m=1000cm

and 8m=800cm.

area of floor 800X1000=800000cm

length of brick 20cm breadth of brick 10cm

now area of brick will be 20X10=200cm

800000÷200(ar of floor / ar of brick)

you can also convert it into meters by dividing by 100

800000÷100=8000

200÷100=2

here 8000÷ 2

4000

you need 4000 bricks

Step-by-step explanation: