Question

Estimate and then calculate how many plastic tiles of 22cm by 18cm will be required to cover a floor of 21m by 33.4m?

Answer 1

Answer:

17713 tiles

Step-by-step explanation:

Estimation - 17700

*Note- Estimation is not necessary.

Solution-

Area of 1 tile = (22×18)$cm^2$

= 396 $cm^2$

Area of the floor = (21×33.4)$m^2$

= 701.4 $m^2$

= 7014000 $cm^2$

∴ No. of tiles needed = $\frac{7014000}{396}$ $\frac{cm^2}{cm^2}$

= 17712.12121......

= 17713 tiles (Approx.)

Hence, approximately 17713 tiles are required.