Question

17. What biggest size of square tiles may be used and how many tiles will be required
for paving a lawn, 385 m by 60 m.​

Answer 1

Step-by-step explanation:

Breadth of a rectangular courtyard =3.78m=378cm

Length of a rectangular courtyard =5.25m=525cm

Now, we have to find H.C.F os 378 and 525

378=2×3×3×3×7

525=5×5×3×7

Common factore=3×7

∴ H.C.F=21

Hence largest size of square tiles that can be paved exactly with square tiles is 21cm.