Question

Vineet wants to polish the floor of a room which is 140 cm long and 120 cm wide . The charges for polishing the floor is 52 per square metre . What will be the cost of polishing the floor of the room ?
use 2×ans​

Answer 1

Answer:

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Vineet wants to polish the floor

The length of the floor = 140 cm = 140/100m=1.4m

The breadth of the floor = 120 cm =120/100m = 1.2

The polishing is done on the area

[ ∴ 1 m = 100 cm ]

[ the cm is converted into m because the charge of polishing the area is in m ]

As, the floor has two different side

so, its a rectangular floor

Now,

Area of the rectangular floor = (lb) unit square

[ In which l is the length and b is the breadth ]

Area of the rectangular floor = 1.4 × 1.2 m sq.

Area of the rectangular floor = 1.68 m sq.

If the cost of polishing 1 m sq. = Rs 52

Than,

The cost of polishing the rectangular floor

= 1.68 × 52

= Rs 87.36

Hence,

Vineet will charge Rs 87.36 for polishing the floor

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Vineet wants to polish the floor

The length of the floor = 140 cm = 140/100m=1.4m

The breadth of the floor = 120 cm =120/100m = 1.2

The polishing is done on the area

[ ∴ 1 m = 100 cm ]

[ the cm is converted into m because the charge of polishing the area is in m ]

As, the floor has two different side

so, its a rectangular floor

Now,

Area of the rectangular floor = (lb) unit square

[ In which l is the length and b is the breadth ]

Area of the rectangular floor = 1.4 × 1.2 m sq.

Area of the rectangular floor = 1.68 m sq.

If the cost of polishing 1 m sq. = Rs 52

Than,

The cost of polishing the rectangular floor

= 1.68 × 52

= Rs 87.36

Hence,

Vineet will charge Rs 87.36 for polishing the floor