Question

a tank is 20 m in length,15 m in breath and 4 m in depth . find the cost of cementing it's walls at rate of 50 rs per square​

Answer 1

l= 20 m

b= 15 m

h= 4 m

First we find the area of floor

=>20x15

=>300 m²

Then, we find area of walls

=>2(20x4) + 2(15x4)

=>2(80 + 60)

=>280 m²

Add both to get total area

=>300+280 = 580 m²

Multiply total area and cost per m²

=>580 x 50

=>Rs. 29000

Hope it'd be useful.Please choose it the brainliest answer.

Answer 2

ANSWER :

Area of the walls

2(20×4) + 2(15×4) = 280 m square

The cost of cementing it's wall = 50rs/square

The cost of cementing the area of 280m square

= 280 × 50

= Rs 14000

ANSWER