4. A rectangular hall is 12 m long and 6 m broad. Its flooring is to b

1.	4. A rectangular hall is 12 m long and 6 m broad. Its flooring is to be made of squaretiles of side 30 cm. How many tiles will fit in the entire hall? How many would berequired if tiles of side 15 cm were used?
Answer» L=12m=12×100cm=1200cm. (1m=100cm) b=6m=6×100cm=600cm area of room=l×b 1200×600=720000cm² a=30cm area of square tile=a×a 30×30=900cm² tiles required=area of room/area of tiles 720000/900=800tiles required in case of 15 cm tiles a=15cm area of tile=15×15=225cm² required tiles=area of room/area of tile 720000/225=3200tiles required

4. A rectangular hall is 12 m long and 6 m broad. Its flooring is to be made of squaretiles of side 30 cm. How many tiles will fit in the entire hall? How many would berequired if tiles of side 15 cm were used?

Answer»

L=12m=12×100cm=1200cm. (1m=100cm)

b=6m=6×100cm=600cm

area of room=l×b

1200×600=720000cm²

a=30cm

area of square tile=a×a

30×30=900cm²

tiles required=area of room/area of tiles

720000/900=800tiles required

in case of 15 cm tiles

a=15cm

area of tile=15×15=225cm²

required tiles=area of room/area of tile

720000/225=3200tiles required