Question

the least number of square tiles needed to pave of the floor of a room 15 M 70 cm and 9M 2cm broad is

Answer 1

The least no. Of tiles need to pave is the HCF of 1570 and 902
that is 2,

Answer 2

hi

aim : to find The least number of square tiles needed to pave of the floor of a room 15 M 70 cm and 9M 2cm broad is

1m = 100cm

15m 70 cm = 1570 cm

9 2cm = 902 cm

now the floor of room is 1570cm and 902 cm

so,

area of the floor = l*b

=1570 *902

=1416140cm



so the area of room is  1416140cm²

now hcf of 1570 and 902

=>  902 = 1,2,11,22,41,82,451,902

1570 = 1,2,5,10,157,314,785,1570,

hcf is 2

so the least tiles  = 1416140/2*2

=1416140/4

=354035 tiles

hope it helps u