Question

plxx do it frnds with full method by step by step explanation plxxx​

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

$\bf{\textcolor{blue}{\colorbox{lime}{Answer : [1] 12,600 Rs.}}}$

$\bf{\textcolor{blue}{\colorbox{lime}{Answer : [2] Time taken = 460sec ~7.6 minutes.}}}$

Answer 2

Answer:

Step-by-step explanation:

Given,

Length(l) = 80 m

Breadth(b)= 35 m

1. Area of Playground= l×b

80×35

2800 m²

Here, 1 m² = 4.50 /-

So, for 2800 m² = 4.50×2800

12600/-

The levelling of playground costs Rs. 12600 /-

2. Perimeter of Playground = 2(l+b)

2(80+35)

2(115)

230 m

Distance covered in 1 round = 230 m

So, the distance covered in 3 rounds = 230×3

                                                              = 690 m

The boy walks at the rate of 1.5 m/s

So, for 3 rounds = Distance covered in 3 rounds / Rate of work

                           = 690/ 1.5

                           = 450 secs or 7 mins 40 secs.

The time taken by the boy to walk 3 rounds in the playground is 7 mins 40 secs.