Question

Vineet wants to polish the floor of a room which is 140cm long and 120cm wide.the charge for polishing for polishing the floor is Rs. 52 per square metre

Answer 1

SOLUTION :

Vineet wants to polish the floor

The length of the floor = 140 cm = $\frac{140}{100}$ m = 1.4 m

The breadth of the floor = 120 cm = $\frac{120}{100}$ m = 1.2 m

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

Answer 2

Answer:

SOLUTION :

Vineet wants to polish the floor

The length of the floor = 140 cm = \frac{140}{100}

100

140

m = 1.4 m

The breadth of the floor = 120 cm = \frac{120}{100}

100

120

m = 1.2 m

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:

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