Question

There are three stair steps.Each stair step has width 25 cm height 50 cm and length 12cm. How many bricks have been used in it,if each brick is 12.5cm*6.25cm*4cm?​

Answer 1

the bricks and stairs are in cuboidal shape.....

for stairs,

width=25cm

length=12cm

height=50 cm

so,

1. volume of stair=l*b*h=25*50*12=15000 cm^3
2. as there are 3 stairs

so, vol. of 3 stairs=3*15000=45000

for brick,

volume of 1 brick=12.5*6.25*4=312.5

so,

number of bricks required=volume of 3 stairs/volume of 1 brick

number of bricks required=45000/312.5=144

$\huge\mathfrak\red{144\: bricks \:are\: required}$

hope it helps!!☺

plzz... follow me.....

Answer 2

Answer:

288bricks

Step-by-step explanation:

QUESTION

There are three stair-steps as shown in the figure below. Each stair step has width 25 cm, height 12 cm and length 50 cm. How many brick

SOLUTION

The 1 st stair-step=h1=12 cm.

The 2 nd stair-step=h2=24 cm.

The 3 rd stair-step=h3=36 cm.

The total height=h= h1+ h2+ h3= 12 + 24 + 36 = 72 cm.

Length and width will remain same.

Length=l=50 cm

Width=w=25 cm

The volume of the three stair-step=Length(l) × Width(w) × Height(h)

The volume of the three stair-step=50 × 25 × 72 cu.cm

Given: The volume of 1 brick = 12.5 × 6.25 × 4 cu.cm

Let the number of bricks required be n.

(12.5 × 6.25 × 4) × n = 50 × 25× 72

n

=

50

×

25

×

72

12.5

×

6.25

×

4

=

288

n=50×25×7212.5×6.25×4=288

288 bricks are used in three stair-steps.

mark me brainlest