Question

The cost of constructing a wall 8m long, 4m high and 20 cm thick at the

rate of ₹ 25 per m3

is ___​

Answer 1

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Dimensions of the wall are,

Length (l)=8m

Breadth (b)=20cm=0.2m

Height (h)=4m

Volume of the hall,

V=lbh

V=8×4×0.2

V=6.4m

3

Cost of building the wall at the rate of Rs.25/m

3=25×V

=Rs.(25×6.4)

=Rs.160

∴ The cost of building the wall is Rs.160

Answer 2

Step-by-step explanation:

Dimensions of the wall are,

• Length (l)=8m

• Breadth (b)=20cm=0.2m
• Height (h)=4m

Volume of the hall,

• V=lbh
• V=8×4×0.2
• V=6.4m³

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