find the curved surface area of a closed cylindrical water tank of diameter 4.2 metre and 19.6 metre high
Answers
Answered by
2
Answer:
Given
Diameter of the cylinders=4.2m
∴ Radius of the cylinders, r =
2
4.2
=2.1m
Height of the cylinders, h=4.5m
Thus, the total surface area of the closed cylindrical
petrol tank=2πrh+2πr
2
=2π(2.1)(4.5)+2.π(2.1)
2
=2.
7
22
×2.1×4.5+2×
7
22
×2.1×2.1[π=
7
22
]
=59.4+27.72
=87.12m
2
Answered by
0
Answer:
258.72
Step-by-step explanation:
radius is half of diameter show the diameter is 4.2 metre , then the radius is 2.1 when we divide the 4.2 from 2 then we will get the radius is 2.1 metre.
r=2.1m
h=19.6m
curved surface area of closed cylindrical tank=2πrh
=2×22/7×2.1×19.6
=44×0.3×19.6
=13.2×19.6
=258.72m²
hopes it more helpful for you
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