Question

32 litres of milk and water solution contain 84% of milk how much water should be added to this solution to reduce its conc to 64%

Answer 1

Answer:

It is given that,

Length, l = 20m

Breadth ,b = 15m

depth, h = 4m

Cost of cementing = 50 per square metre

we have to calculate the cost of cementing its floor and its four walls.

Calculating Area of Floor :

:\implies:⟹ Area of Floor = 20×15

:\implies:⟹ Area of Floor = 300m²

Calculating CSA of Room :

:\implies:⟹ CSA of Room = 2(l+b)h

:\implies:⟹ CSA of Room = 2(20+15)4

:\implies:⟹ CSA of Room = 2(35)4

:\implies:⟹ CSA of Room = 70×4

:\implies:⟹ CSA of Room = 280m²

Total area = Area of Floor + Area of Four walls

Total Area = (300+280)m²

Total Area = 580m²

Now, calculating the total cost of cementing .

:\implies:⟹ Total Cost of Cementing = 580×50

:\implies:⟹ Total Cost of Cementing = Rs 29000

Hence, the total cost of cementing is 29000 .