The diameter of a roller 120cm long is 84cm
WebThe diameter of a roller is 84 cm and its length is 120 cm. It takes 500 complete revolutions to move once over to level a playground. Find the area of the playground in m 2 Medium Solution Verified by Toppr Given: Height =120cm, R= 284=42 cm ⇒CSA=2πrh=2× 722×42×120cm 2=31680 cm 2 ⇒Area =500×CSA =500×31680 cm 2 WebMar 14, 2012 · the diameter of the roller 120 cm long is 84 cm. if it takes 500 complete revolutions to level a playground, determine the cost of levelling at the rate of 30 paise per sq. m. ... Share 28. Diameter = 84cm. Radius = 42cm. Height = 120cm. 1 revolution = LSA of roller = 2 x (22/7) x 42 6 x 120 = 31680 cm 2. So, 500 revolutions = 31680 x 500 ...
The diameter of a roller 120cm long is 84cm
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WebApr 12, 2024 · Step-by-step explanation: the diameter of Roller is 84cm we know that radius is half of the diameter . we get, radius \: of \: roller = 42cmradiusofroller=42cm the roller is 120 cm long that is height\:of\:roller \:=120cmheightofroller=120cm CURVED SURFACE AREA OF CYLINDRICAL ROLLER =2πrh =2×22/7×42×120 =2×22×6×120 =31680sq.cm . WebApr 5, 2024 · The shape of the roller is a cylinder. So, we have to basically find the curved area of the cylinder which has diameter =84cm and length 120cm. Thus, the radius of cylinder will be: R = D 2 = 84 2 = 42 c m. Let us draw the cylinder to get a better view.
WebQuestion The diameter of a roller 120 cm long is 84 cm. If it takes 500 completed revolutions to level a play ground, determine the cost of levelling it at the rate of Rs. 2.50 per square metre. Hard Solution Verified by Toppr Roller is in the form of a cylinder as shown in the image. Given, h=120 cm , Radius r= 2Diameter= 284=42 cm WebThe diameter of a roller is 84 cm and its length is 120cm. It. The diameter of a roller is 84cm and its length is 120cm It takes 500 complete revolutions to move once over to level a playground Find the
WebThe diameter of a roller is 84cm and its length is 120cm. It takes 500 complete revolutions to move once over a level a playground. Find the area of the playground in m 2. A 1584m 2 B 1284m 2 C 1554m 2 D none of the above Medium Solution Verified by Toppr Correct option is A) Radius of the roller (r)= 284cm=42cm length of the roller (h)=120cm WebThe diameter of roller 1.5 m long is 84 cm. If it takes 100 revolutions to level a playground, find the cost of levelling this ground at the rate of 50 paise per square metre. ... The diameter of a roller 120 cm long is 84 cm. If it takes 500 complete revolutions to level a playground, dtermine the cost of levelling it at the rate of 30 paise ...
WebJun 18, 2024 · Best answer. 2r = 84cm. ∴ r = 84/2cm = 42cm. h = 120cm. Area of the playground leveled in one complete revolution = 2 π rh. = 2 × 22/7 × 42 × 120 × 31680cm 2. ∴ Area of the playground = 31680 × 500cm 2. = (31680 x 500)/ (100 x 100)m 2 = 1584m 2. ∴ Cost of leveling @ Rs 25 per square metre = Rs 1584 × 25 = 39600.
WebThe diameter of a roller is 84 cm and its length is 120cm. It takes 500 complete revolution to move once over to level playground. Find the area of the playground in m2. View More Related Videos Surface Area of Solids MATHEMATICS Watch in App Explore more Curved Surface area of a right circular cylinder Standard IX Mathematics CBSE ICSE IAS JEE how clear cache chromeWebSep 23, 2024 · answered the diameter of a roller 120cm long is 84cm if it takes 500 complete Revolution to level a playground determine the cost of levelling it at the rate of 45 paise per square metre Advertisement Answer 12 people found it helpful Divyasamota Diameter=84cm therefore radius=42cm height=120cm area rolled in 1 revolution=c.s.a how clear certificates in edgeWebThe diameter of a roller is 84 cm and its length is 120 cm. It takes 500 complete revolutions to move once over to level a playground. Find the area of the playground in m 2 ? [Assume .π=22/7]A. 1984 m 2B. 1584 m 2С. 2584 m 2D. 1534 m 2 how clear cash on your laptopWebJan 19, 2024 · Diameter = d = 84cm Radius = r = d/2 = 42cm Length = l = 120 cm T.S.A of cylinder = 2πrh = 2 x 22/7 x 42 x 120 = 31680 cm² Area levelled by 500 revolution = Area of playground = 500 x 31680cm² = 15840000 cm² [ change into m] = 1584 m² Advertisement Still have questions? Find more answers Ask your question how many planes hit the laffeyWebNov 9, 2024 · Best answer Radius of the roller (r) = 84/ 2 cm = 42 cm Length of the roller (h) = 120 cm Curved surface area of the roller = 2πrh = 2 × 22/ 7 × 42 × 120 cm2 = 44 × 720 cm2 = 31680 cm2 ∴ area covered by the roller in 1 revolution = 31680 cm2 ∴ area covered by the roller in 500 revolutions = 31680 × 500 cm2 = 15840000 cm how clear browsing history and cookiesWebMar 2, 2024 · Answer. The diameter of a roller 120cm long is 84cm. If it takes 500 complete revolutions to level a playground, determine the cost of levelling it at the rate of Rs. 2.50 per square metre. Last updated date: 12th Jan 2024. how clear cache cookiesWebJun 22, 2024 · This is the Solution of Question From RD SHARMA book of CLASS 9 CHAPTER SURFACE AREA AND VOLUME This Question is also available in R S AGGARWAL book of CLASS... how clear can pee be