Question

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Question In attachment ​

Answer 1

Given,

length = 80cm

Breadth = 35cm

$\implies$ ⟹ Perimeter of Rectangle = 2(Length + breadth}

$\implies$⟹ 2(80+35)

$\implies$⟹ 2(115)m

$\implies$⟹ = 230m

$\implies$⟹ Area of Rectangular field= lenght × breadth

$\implies$⟹ = 80×35

$\implies$⟹ = 2800 m²

Cost of levelling = Rs. 4.5/m²

$\implies$⟹ = 4.5×2800

$\implies$⟹ = 12,600 rs.

The boy walks at the rate of 1.5m /sec.

The boy will walk across the perimeter of the field.

$\implies$⟹ (3 rounds) 3× 230

$\implies$⟹ = 690 m

Total Distance = 690 m

$\implies$⟹ Speed = Distance /time

$\implies$⟹ Time = 690/1.5

$\implies$⟹ = 460 seconds

$\implies$⟹ = 7.6Minutes

$\bf{\textcolor{blue}{\colorbox{lime}{Answer : [1] 12,600 Rs.}}} [tex]\bf{\textcolor{blue}{\colorbox{lime}{Answer : [2] Time taken = 460sec ~7.6 minutes.}}}$

Answer 2

Answer : 1) 12,600rs.

Answer 2) 490 seconds

hope it helps