Question

find the cost of painting a tank of dimension 3m×2m×1.5m at rupees 20 per square metre

Answer 1

Hi

It is given that ,

Dimensions of the tank :

Length ( l ) = 3m

Breadth ( b ) = 2m

height ( h ) = 1.5 m

Total surface area = 2( lb + bh + lh )

= 2 [ 3 ×2 + 2 × 1.5 + 3 × 1.5 ]

= 2 ( 6 + 3 + 4.5 )

= 2 × 13.5

= 27 m²

Cost of painting 1 sq metre = Rs 20

Cost of painting 27 square meters

= 20 × 27

= Rs 540

I hope this helps you.

: )

Answer 2

Heya !!!


Length of tank = 3 m


Breadth of tank = 2 m


And,


Height of tank = 1.5 m



Therefore,


TSA of tank = 2(LB+ BH + HL)


=> 2 ( 3 × 2 + 2 × 1.5 + 1.5 × 3)




=> 2 ( 6 + 3 + 4.5)


=> 2 ( 13.5)


=> 27 m²


Cost of painting of 1 m² = Rs 20.


Therefore,



Cost of painting of 27 m² = 20 × 27 = Rs 540.





HOPE IT WILL HELP YOU...... :-)