Question

Answer question no.8 with solution

Answer 1

Mensuration,

We have a floor which has an area of 15×8 m²

Have to cover this area with tiles of length and breadth 50 cm(0.5m) by 25 cm(0.25m).

Now the area covered by one tile
= (0.5×0.25)m²

= 1.25 m²

So the number of tiles required
= (15×8)/1.25

= 96 tiles

Now if a carpet is laid then 1 m space is left between the edges of the carpet and the floor.

So the area wich is uncovered
= (15×8)-{(15-1)×(8-1)} m²

= 120 - 98 m²

= 22 m²

So the fraction of the floor which is uncovered is when carpet is laid is equal to 22 m².

That's it
Hope it helped ( •̀.̫•́✧ )