find the area of road rolled by roller in 100 revolution whose diameter is 84 cm and length is 105 CM
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Answered by
0
Step-by-step explanation:
As it is roller , it's shape is cylinder.
area rolled in one revolution = CSA of cylinder
2× pie × r × h = 2×22÷7×42×105 ( as d=84, r= 42)
= 44×6×105
=27720 cm
area covered in 100 revolution = CSA ×100
=27,72,000 cm
Answered by
1
Answer:
AREA OF ROAD IS 2772000 square cm
Step-by-step explanation:
GIVE
DIAMETER OF ROLLER =84 cm
so, radius of roller =42cm
LENGTH OF ROLLER=105cm
AREA OF ROAD =100×curved surface area of roller
AREA OF ROLLER =100×2πrh
=100×2×22÷7×42×105
= 2772000 square cm
=277.2 square metre
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