a cylindrical oil tank has diameter 7 m and height 9 m. if the inner side of the tank has to be painted all over,what will it cost at rupees 35 per square metre?
Answers
Answered by
257
TSA of cylinder = 2πr(h+r)
= 2 x 22/ 7 x 7/2 (9 +3.5)
=22 x 12.5
= 275 m²
cost = 275 x 35 = rs 9625
= 2 x 22/ 7 x 7/2 (9 +3.5)
=22 x 12.5
= 275 m²
cost = 275 x 35 = rs 9625
snic:
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Answered by
52
Area which had to be paint will be CSA + base area = 2πrh + πr²
So, area to be painted = 2π * 7/2 * 9 + π * 7 = 220 m²
For 1 m² = Rs. 35
so, for 220 m² = 220 * 35 = Rs. 7700
So, area to be painted = 2π * 7/2 * 9 + π * 7 = 220 m²
For 1 m² = Rs. 35
so, for 220 m² = 220 * 35 = Rs. 7700
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