Question

A circular flower bed is of radius 3.5 m. If 1/2 kg of fertilizer is required for 1 square metre area, how much fertilizer will be required for the flower bed?

Answer 1

Heya..
Here is your answer ----

=> Radius of the circular flower bed = 3.5 m

=> Area of the circular flower bed = π × r^2
= 22/7 × (3.5)^2
= 22/7 × 12.25
= 22 × 1.75
= 38.5 m^2

=> Fertilizer required for 1 m^2 = 1/2 kg = 0.5 kg

=> Fertilizer required for 38.5 m^2 = 0.5 × 38.5
= 19.25 kg
= 19 1/4 kg

HOPE IT HELPS...!!

Answer 2

Hiii........

Here it is...

Area of circular flower beds =

$\pi \times {r}^{2}$

=> 22/7 × 3.5 × 3.5

=> 38.5 m^2......... (1)

Now,

Amt. of fertiliser reqd. for flower bed

=> area × Amt of fertiliser for 1 Sq metre

=> 38.5 × 1/2

=> 19.25 kg

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