A square tile has side 30 cm. How many of these tiles will cover a rectangular floor of length 7.2m and width 4.2m?
-
A.
720 -
B.
336 -
C.
420 -
D.
576
Correct Answer: Option B
Explanation
Length of the tile = 30 cm = 0.3m
Area of the tile = 0.3 (times) 0,3 = 0.09 m(^2)
Area of the room = (7.2 (times) 4.2)m(^2)
Number of tiles = (frac{7.2 times 4.2}{0.09})
= 336
There is an explanation video available below.