Question

a tank is 20m length , 15 m in breadth and 4m in dept . find the cost of cementing its floor and four walls at the rate of rupee 50 per square meter
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Answer 1

Answer:

Rs 26390

Step-by-step explanation:

^_^

Given that :-

Length of tank = 20m

breadth of tank = 15 m

height of tank = 4m

Now , we have to find the area of four walls as well as the area of base .

That means , we have to find :-

Lateral surface area + area of base .

So ,

2 ( l + b ) * h + lb

By putting value of l , b and h , we get ,

2 ( 20 + 15 ) * 4 + 20 * 15

= 8 * 35 + 300

= 280 + 300

= 580 m² .

Now ,

Cost of 1m² = Rs 45.50

Cost of 580 m² = Rs ( 45.50 * 580 )

= Rs 26390 ( by calculating ) .

Answer 2

Answer:

^_^

Given that :-

Length of tank = 20m

breadth of tank = 15 m

height of tank = 4m

Now , we have to find the area of four walls as well as the area of base .

That means , we have to find :-

Lateral surface area + area of base .

So ,

2 ( l + b ) * h + lb

By putting value of l , b and h , we get ,

2 ( 20 + 15 ) * 4 + 20 * 15

= 8 * 35 + 300

= 280 + 300

= 580 m² .

Now ,

Cost of 1m² = Rs 45.50

Cost of 580 m² = Rs ( 45.50 * 580 )

= Rs 26390 ( by calculating ) .

^_^..

hope it helps uh...

Step-by-step explanation:

MissInvisible...✌️