JAMB - Mathematics (1989 - No. 34)
A square tile has side 30cm. How many of these tiles will cover a rectangular floor of length 7.2m and width 4.2m?
336
420
576
720
설명
Total floor area = 720 x 420
Area of one tile = 30 x 30
No. of tile required = \(\frac{720 \times 420}{30 \times 30}\)
= 24 x 14
= 336 tiles
Area of one tile = 30 x 30
No. of tile required = \(\frac{720 \times 420}{30 \times 30}\)
= 24 x 14
= 336 tiles