Question

a hall in the form of a rectangular region is 28 metres long and 12 metre wide it's floor is to be covered with square slabs of side 16 cm what will be the cost of the slabs required to cover the region if the cost of hundred slabs is rupees 250

Answer 1

Length =28 m   Breadth =12m

∴Area of rectangle = L×B ⇒[28 m  × 12m] ⇒  336  sq m

square slabs of side = [0.16 cm =0.16 m] ⇒

∴Area of square slab =[side]^2  =[0.16 m ×0.16 m ]  ⇒0.0256  sq m

∴Nos of slabs needed =[Area of rectangle  ÷ Area of square ]  

∴Nos of slabs needed =[336  sq m  ÷ 0.0256  sq m ]

∴Nos of slabs needed = 13125  

the cost of 100 slabs is rupees 250

∴cost of 13125 = [250÷100] × 13125

                       =2.5× 13125 ⇒RS 32812.5

the cost of the slabs =  RS 32812.5    ANS

Answer 2

Answer:

Rs 32812.5

Step-by-step explanation:

the length and breadth of the rectangular floor is 28m and 12m respectively.

so the area is 28×12=336 sq m.

the measure of the side of the square slab is 16 cm = 0.16 m

so are of the square slab is 0.16×0.16=0.025 sq m.

number of slabs required= area of the floor/ area of the slab

336/ 0.0256= 13125 slabs.

cost of 100 slabs is 250

so cost of 13125 slabs is 250/100×13125 = ₹ 32812.5

therefore cost of 13125 slabs is ₹ 32812.5

Hope it helps you