Find the volume and surface area of the double cone formed, Mathematics

Assignment Help:

A right triangle whose sides are 15 cm and 20 cm is made to revolve about its hypotenuse. Find the volume and surface area of the double cone so formed.

(Ans : 3768cu.cm,1318.8  Sq.cm)

1920_tringle9.png

Ans:    BC = √152 + √202

= 25 cm

Apply Py. Th to right ΔOAB & OAC to get OB = 9cm       OA = 12cm

Vol of double cone     = vol of CAA1 + vol of BAA1

= 1/3 π × 122  × 16 + 1/3 π × 122 × 9

= 3768 cm3

SA of double cone      = CSA of CAA1 + CSA of BAA1

= π ×  12 × 20 +π × 12 × 15

= 1318.8 cm3


Related Discussions:- Find the volume and surface area of the double cone formed

Example of learning to count, A parent shows his child four pencils. He pla...

A parent shows his child four pencils. He places them in a row in front of her and says "one" as he points to the first pencil, "two" as he points to the second one, "three" as he

Demand Forecast, How should shoppers Stop develop its demand forecasts?

How should shoppers Stop develop its demand forecasts?

Integraton, how to find area under a curve

how to find area under a curve

Percentage, there are 300 students in the sixth grade. if 40% of them were ...

there are 300 students in the sixth grade. if 40% of them were girls, how many boys were there?

First order differential equations, In this section we will consider for so...

In this section we will consider for solving first order differential equations. The most common first order differential equation can be written as: dy/dt = f(y,t) As we wil

Examples on log rules, Examples on Log rules: Example:      Calculate...

Examples on Log rules: Example:      Calculate (1/3)log 10   2. Solution: log b n√A = log b A 1/n = (1/n)log b A (1/3)log 10 2 = log 10 3 √2 = log 10 1.

Trapezoid rule - approximating definite integrals, Trapezoid Rule - Approxi...

Trapezoid Rule - Approximating Definite Integrals For this rule we will do similar set up as for the Midpoint Rule. We will break up the interval [a, b] into n subintervals of

Karls pearsons co-efficient of correlation, Aim: To test the significan...

Aim: To test the significant relationship between the accounting ratios of operating management and standard ideal ratios. Null Hypothesis(H 0 ) : There is no significa

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd