Question

A series of steps lead to a temple.The number of steps is 20.Each step has a rise of 15 cm and tread of 40 cm,Each step is 10m long.Calculate the volume of concrete required to build the stair ?

Answer 1

1 step
Height=15 cm=0.15 m
Breadth=40 cm=0.4 m
Length=10 m

Volume=l×b×h
=10×0.4×0.15
=0.6 m³

1 step Volume=0.6 m³
20 steps =0.6×20=12 m³

$\boxed{\mathbf{Volume={12m}^{3}}}$

Answer 2

Answer: Volume of concrete  required to build the stair is 12 cubic meter.

Step-by-step explanation:

Since we have given that

Number of steps = 20

Length of step = 10 m

Height of step = 15 cm = 0.15 m

Width of step = 40 cm = 0.40 m

So, volume of concrete for each step is given by

$Volume=Length\times breadth\times height\\\\Volume=10\times 0.15\times 0.40\\\\Volume=0.6\ m^3$

So, Volume of concrete required to build the stair is given by

$0.6\times 20\\\\=12\ m^3$

Hence, Volume of concrete  required to build the stair is 12 cubic meter.