Assuming you mean 18 inch by 18 inch, you will need 133 and 1/3 tiles.
3
1 foot = 12 inch3 feet 6 inch = (3 x 12 + 6 ) inch = 42 inch
1 inch = 25.4 mm 3 inch = 3 x 25.4 mm
An inch equals 2.54 cm. Hence in 3 inches, there are 7.62 cm.
Assuming you mean 18 inch by 18 inch, you will need 133 and 1/3 tiles.
You'd need give at least 3 dimensions for someone to figure out the answer.
1 inch = 2.54 cm therefore , 3 inch=2.54*3=7.62cm hence, 3 inch=7.62cm
1 inch is 3 barleycorn.
1 3/4
you would need 3 feet of pipe
1 sq foot = 144 sq inch 3 inch x 3 inch = 9 sq inch = 9/144 sq feet = 0.0625 sq feet
3
1 foot = 12 inch3 feet 6 inch = (3 x 12 + 6 ) inch = 42 inch
1 inch = 25.4 mm 3 inch = 3 x 25.4 mm
1 inch = 2.54 cm3 inch = 2.54 x 3 = 7.62 cm
An inch equals 2.54 cm. Hence in 3 inches, there are 7.62 cm.