Question

Square tiles of side 20 cm are to be laid on the floor of a room 10 m by 4.5 m. How many tiles will be needed ? Find the cost of fencing at ₹22.50per tile.

Answer 1

Area of a tile= l× b

= 12×10 cm

=120cm

Area of a wall= l×b

=400×300cm

=120000cm

No. of marbels required

=Area wall/ Area of marbels

120000/120 reduced =1000

=1000 marbels

Total cost = 22.5×1000

=22500 rupees.....

I think this will help you a lot......