6. The diameter of a solid metal cylinder is 7 cm. If the cost per cc to make
the cylinder is * 2:50 and the total cost is 1078, what is its height?
Answers
Answer:
You have not mentioned that whether the Cylinder is hollow or solid from inside and you have also not mentioned that whether the Cylinder is open or closed. But I am assuming it as hollow and closed because in maximum cases it is hollow and closed.
Step-by-step explanation:
Given, Diameter = 7 cm i.e., Radius = 3.5 cm
Given, Total cost = ₹ 1078
and, Rate = ₹ 2.50 / cc
Hence, Total Surface Area = 1078/2.50
= 107800/250
= 10780/25
= 431.2
By condition,
2×22/7×r(h+r) = 431.2
=> 2×22/7×3.5(h+3.5) = 431.2
=> 2×22/70×35(h+3.5) = 431.2
=> 2×22/10×5(h+3.5) = 431.2
=> 220/10(h+3.5) = 431.2
=> 22(h+3.5) = 431.2
=> h+3.5 = 431.2 / 22
=> h+3.5 = 4312/220 = 19.6
=> h = 19.6 - 3.5 = 16.1 cm (ans).
The height of the Cylinder is 16.1 cm.
KINDLY SELECT MY ANSWER AS THE BRAINLIEST ANSWER.
Answer:
total volume( as cc is mentioned in question) = 1078/*2.50
= 431.2 cc
By The Prob. pie r²h = 431.2 ( where r=3.5cm)
By doing the calculation we get H= 11.2 cm