Question

a bucket is in the form of a cylinder of radius 3.5cm and height 12 cm . find the total surface area , if top of the bucket is open.

Answer 1

Answer:

for cylindrical bucket,

r = 3.5cm

h = 12 cm

TSA of bucket if it is open at top =2πr(r+h)-2πr

=2*22/7*3.5(3.5+12)-2*22/7*3.5

341-22=319

Answer 2

The total surface area,if top of the bucket is open is 75.36 square cm.

Step-by-step explanation:

Given : A bucket is in the form of a cylinder of radius 3.5 cm and height 12 cm.

To find : The total surface area, if top of the bucket is open ?

Solution :

The radius of the cylindrical bucket is r=3.5 cm.

The height is h=12 cm.

The total surface area of bucket is $TSA=2\pi r(r+h)$

As top is open then area is $A=2\pi r$

The total surface area, if top of the bucket is open is given by

$SA=2\pi r(r+h)-2\pi r$

Substitute the value in the formula,

$SA=2\times 3.14\times (3.5+12)-2\times 3.14\times 3.5$

$SA=2\times 3.14\times 15.5-2\times 3.14\times 3.5$

$SA=97.34-21.98$

$SA=75.36$

Therefore, the total surface area,if top of the bucket is open is 75.36 square cm.

#Learn more

A bucket has top and bottom diameters of 40cm and 20cm respectively. Find the volume of the bucket if its depth is 12cm. Also, find the cost of tin sheet used for making the bucket at the rate of Rs. 1.20 per dm sq. (Use pie= 3.14) How to get the cost in it?

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