a closed metallic cylinder has its base diameter 56 cm and it is 2.25 M high find the cost of the metal used to make it if it cost Rs 80 per square metre??
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Answered by
5
Sol:) Diameter of the metallic cylinder = 56 cm
Radius of the cylinder = 28 cm
Height of the cylinder = 2.25 cm
Total surface area of the cylinder = 2πr(h + r) =
2 x 22/7 x 28 (2.25 + 28) = 176 x (30.25) = 5324 cm2
Rate of the sheet = Rs 80 per cm2
Total cost of the sheet used to make the culinder = 5324 x 80 = Rs 425920
rahuldutta72:
per sp m
not cm square
U forgot to convert the cm to meter man and the question is based on meter sq
Check mine below
Answered by
2
Answer:
r=28÷100=0.28m
Total surface
area of cylinder= 2πr(r+h)
=2×22÷7×O.28(0.28+2.25)
=44×0.4(2.53)
=17.6×2.53
=44.528sq m
1sq m = 80 RS
44.528=?
44.528×80
3562.24rs
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