find the lateral surface area of a cylindrical pillar with radius 14 cm and height 5. if the cost of white washing is rupees 5 per square metres find the cost of a white washing 8 such Pillars
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In a cylindrical pillar,
Given that,
Radius = 14 cm
Height = 5 cm
Lateral Surface area = 2πrh sq.units
===> 2 × 22/7 × 14 × 5
===> 44 × 10
===> 440 sq.cm
LSA of 8 pillars = 3520 sq.cm
Cost of whitewashing for one square meter ========> ₹5
Cost of whitewashing for 3520 square meter =========> ₹ 17, 600.
Given that,
Radius = 14 cm
Height = 5 cm
Lateral Surface area = 2πrh sq.units
===> 2 × 22/7 × 14 × 5
===> 44 × 10
===> 440 sq.cm
LSA of 8 pillars = 3520 sq.cm
Cost of whitewashing for one square meter ========> ₹5
Cost of whitewashing for 3520 square meter =========> ₹ 17, 600.
anshrajani123:
here height is 5 not 2
you has taken height as 2
yup! no prob
Answered by
0
Answer:
the lateral surface area of cylinder is= 2\pi rh
r=14cm h=5cm so 2*22/7*14*5= 440cm^2
cost of white washing=440*5/100*8=Rs 88
so ans is Rs 88
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