Answer:
Radius of the roller (r)=
2
84
cm=42cm
length of the roller (h)=120cm
∴ Area of the playground levelled in taking 1 complete revolution 2πrh
=2×227×42×120=31680cm
∴ Area of the playground
=31680×500=15840000cm
100×100
15840000
m
=1584m
Step-by-step explanation:
According to the Question
It is given that,
we have to calculate the area of playground .
Calculating the Radius of roller
→ Radius = d/2
→ Radius = 42/2
→ Radius = 21 cm
Area of Playground in 1 Revolution = 2πrh
substituting the value we get
→ Area in 1 Revolution = 2×22/7×21×60
→ Area in 1 Revolution = 44 × 3 × 60
→ Area in 1 Revolution = 7920 cm²
So, Area in 1000 Revolution = 7920×1000
→ Area in 1000 Revolution = 7920000 cm²
Conversion of Unit
Area in1000 Revolution =7920000/10000
→ Area in 1000 Revolution = 792 m²
Copyright © 2024 EHUB.TIPS team's - All rights reserved.
Answers & Comments
Answer:
Radius of the roller (r)=
2
84
cm=42cm
length of the roller (h)=120cm
∴ Area of the playground levelled in taking 1 complete revolution 2πrh
=2×227×42×120=31680cm
2
∴ Area of the playground
=31680×500=15840000cm
2
100×100
15840000
m
2
=1584m
2
Verified answer
Answer:
Step-by-step explanation:
According to the Question
It is given that,
we have to calculate the area of playground .
Calculating the Radius of roller
→ Radius = d/2
→ Radius = 42/2
→ Radius = 21 cm
Area of Playground in 1 Revolution = 2πrh
substituting the value we get
→ Area in 1 Revolution = 2×22/7×21×60
→ Area in 1 Revolution = 44 × 3 × 60
→ Area in 1 Revolution = 7920 cm²
So, Area in 1000 Revolution = 7920×1000
→ Area in 1000 Revolution = 7920000 cm²
Conversion of Unit
Area in1000 Revolution =7920000/10000
→ Area in 1000 Revolution = 792 m²