Question

The cost of constructing a wall 8 m long, 4 m high and 10 cm thick at the rate of Rs. 25 per m³ is

Options

•  Rs. 16

•  Rs. 80

• Rs. 160

• Rs. 320

Answer 1

Dimensions of the wall are,

Length (l) = 8 m 

Breadth  (b) = 20 cm 

 = 0.2 m 

Height (h) = 4 m

Volume of the hall,

V= lbh

  = 8 × 4 × 0.2

 = 6.4 m³

Cost of building the wall at the rate of Rs. 25/m³,

=25 ×  v

=Rs. (25 ×  6.4)

= Rs . 160

The cost of building the wall is Rs.160 .