Question

ᴘʟs sᴏʟᴠᴇ ᴛʜɪs.......​

Answer 1

$\huge{\boxed{\rm{\red{Total cost=₹513.45}}}}$

Step-by-step explanation:

Given:-

A class room is 7m long ,6.5m wide and 4m high. It has one door 3m 1.4m and three window,each measure 2m and 1m .the interior wall is to be colour washed .The contract charge ₹5.25 per sq.m.

To find:-

Find the cost of color washing the room.

Solution:-

Length of the class room(l)=7m

Breadth of the class room(b)=6.5m

Height of the class room(h)=4m

Area of the four walls of the room=

A=2h(l+b) sq. units

=>A=2×4×(7+6.5)sq.m

=>A=8(13.5)sq.m

=>A=108 sq.m

Area of four walls of the room =108 sq.m.

Length of a door(l)=3m

Breadth of the room (b)=1.4m

Area of the door=l×b sq. units

=>A=3×1.4=4.2sq.m.

Area of the door=4.2 sq.m.

Length of the window(l)=2m

Breadth of the window(b)=1m

Area of the window(A)=lb sq.units

=>A=2×1=2 sq.m

Area of one window=2 sq.m

No. of windows in the room=3

Area of three windows=3×2=6 sq.m.

Area of the color washing the room=

Area of the four walls-(area of a door+area of three windows)

=>108-(4.2+6) sq.m.

=>108-(10.2)sq.m.

=>108-10.2 sq.m.

=>97.8 sq.m.

Area of the room which is to be coloured ashing=97.8 sq.m.

Contract for colour washing the room per 1sq.m.= ₹5.25

Total cost of the room colour washing

=97.8×₹5.25

=₹513.45

Answer:-

Total cost of the colour washing the room is ₹513.45

Answer 2

Step-by-step explanation:

Given:-

A class room is 7m long ,6.5m wide and 4m high. It has one door 3m 1.4m and three window,each measure 2m and 1m .the interior wall is to be colour washed .The contract charge ₹5.25 per sq.m.

To find:-

Find the cost of color washing the room.

Solution:-

Length of the class room(l)=7m

Breadth of the class room(b)=6.5m

Height of the class room(h)=4m

Area of the four walls of the room=

A=2h(l+b) sq. units

=>A=2×4×(7+6.5)sq.m

=>A=8(13.5)sq.m

=>A=108 sq.m

Area of four walls of the room =108 sq.m.

Length of a door(l)=3m

Breadth of the room (b)=1.4m

Area of the door=l×b sq. units

=>A=3×1.4=4.2sq.m.

Area of the door=4.2 sq.m.

Length of the window(l)=2m

Breadth of the window(b)=1m

Area of the window(A)=lb sq.units

=>A=2×1=2 sq.m

Area of one window=2 sq.m

No. of windows in the room=3

Area of three windows=3×2=6 sq.m.

Area of the color washing the room=

Area of the four walls-(area of a door+area of three windows)

=>108-(4.2+6) sq.m.

=>108-(10.2)sq.m.

=>108-10.2 sq.m.

=>97.8 sq.m.

Area of the room which is to be coloured ashing=97.8 sq.m.

Contract for colour washing the room per 1sq.m.= ₹5.25

Total cost of the room colour washing

=97.8×₹5.25

=₹513.45

Answer:-

Total cost of the colour washing the room is ₹513.45