A parallelogram-shaped hall has an area of 180 cm2. It is tiled with parallelogram-shaped tiles of base of 3 cm and height 4 cm. If each tile costs ₹7, then cost of tiling the hall is ___.
₹105
The number of tiles = area of hallarea of 1 tile
= 1803×4
= 15
Cost of tiling = cost of 1 tile × number of tiles
= 7 × 15
= ₹105