Question

11. A rectangular field is of length 25 m and width
21 m. A 2.5 m wide strip is levelled all around it
at the rate of 5 per m2. Find the cost of levelling
the strip
​

Answer 1

$\huge\mathfrak\red{Answer}$

★Given :-

◒Length = 25cm

◒width = 21cm

◒A wide strip is levelled all around it = 2.5m

❝we should understand that we have

two rectangles = inner and outer rectangle❞

★Find :-

◓Area of inner rectangle

◓Area of outer rectangle

◓Area of the strip

◓Cost of levelling the strip

★Solution :-

◍Area of inner rectangle = l×b

⇛25m×21m

⇛525m²

Hence,The Area of inner rectangle is 525m²

◍Area of outer rectangle = l×b

⇛length = 25+2.5+2.5 = 30m

⇛Breadth = 21+2.5+2.5 = 26m

⇛30m×26m

⇛780m²

Hence, The Area of outer rectangle is 780m²

◍Area of the strip =

Area of outer rectangle - Area of inner rectangle

⇛780 - 525

⇛255m²

Hence,The Area of strip is 255m²

◍Cost of levelling the strip is =

⇛RS 5 per m²

⇛255 × 5

⇛RS 1275

Hence,The cost of levelling of the strip is RS 1275

Answer 2

Answer:

The cost of levelling the strip is rs.1275

Step-by-step explanation:

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