Question

A gardener want to fence a circular garden of diameter 21m find the length of the rope, he needs to purchase, if he makes two rounds of fence find the cost of the rope if it cost rs 4 per meter

Answer 1

Solutions :-


Given :
Diameter of circular garden = d = 21 m


Find the circumference of the circular garden :-

Circumference = πd unit
= 21 × 22/7 m
= 3 × 22 m = 66 m


Gardener makes two rounds of fence with a rope. Therefore the circumference of circular garden will be doubled.

Length of rope = 66 × 2 = 132 m


Now,
Cost of 1 m rope = Rs 4
Cost of 132 m rope = Rs 4 × 132 = Rs 528


Hence,
Length of rope = 132 m
Cost of rope = Rs 528

Answer 2

$\large \tt AHOY!! \:$

atq, a gardener want to fence a circular garden of diameter 21m. we have to find the length of the rope required to fence two rounds and also the total cost of the rope @ of rs 4 per meter.

given diameter = 21cm

therefore it's radius = 21/2 = 11.5cm

$\sf circumference \: of \: the \: garden = 2\pi \: r \\ = \sf \cancel2 \times \frac{ 22}{ \cancel{7}} \times \frac{ \cancel{21}^{3} }{ \cancel{2}} \\ = \sf 22 \times 3 \\ \sf = 66m$

therefore total rope required = 66 × 2
= 132m

hence, total cost to fence = 132 × 4
= rs 528

$\tt \large HOPE \: THIS \: HELPS!!$