Calculate the total surface area which is exposed , Mathematics

Assignment Help:

A golf ball has a diameter equal to 4.1cm. Its surface has 150 dimples each of radius 2mm. Calculate the total surface area which is exposed to the surroundings assuming that the dimples are hemispherical.

(Ans: 71.68)

Ans:    SA of ball = 4π × ( 4.1/2 )2   = 16.8 π cm2

TSA exposed to surroundings

= SA of ball - 150  × π r2 + 150  × 2π r2

= 16.8 π + 150 π r2

= 71. 68 cm2

 


Related Discussions:- Calculate the total surface area which is exposed

Algebra, 2x+2y=10 and 3y+4x=9

2x+2y=10 and 3y+4x=9

Range of f(x) =4^x+2^x+1 is, Taking 2^x=m and solving the quadratic for get...

Taking 2^x=m and solving the quadratic for getting D>=0 we get range= [3/4 , infinity )

Evaluate the volume of the shaded region, If the hight of pipe is 18 inches...

If the hight of pipe is 18 inches, what is the volume of the shaded region in terms of π? a. 31.5π in 3 b. 126π in 3 c. 157.5 in 3 d. 58.5 in 3

Angles, how to measure missing angle of an adjacent angle

how to measure missing angle of an adjacent angle

Find the distance of the journey, A train covered a certain distance at a u...

A train covered a certain distance at a uniform speed.  If the train would have been 6km/hr faster, it would have taken 4hours less than the scheduled time.   And if the train were

Equation, Solve : 4x2+2x+3=0 Ans) x^2 + (1/2)x = -(3/4) (x+1/4)^2 = 1/...

Solve : 4x2+2x+3=0 Ans) x^2 + (1/2)x = -(3/4) (x+1/4)^2 = 1/16 - 3/4 = -11/16 implies x = (-1+i(11)^(1/2))/4 and its conjugate.

Z-value, A study was conducted to determine the proportion of people who dr...

A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 317317 people over the age of? 55, 7777 dream in black and? whi

Interval of convergence - sequences and series, Interval of Convergence ...

Interval of Convergence After that secondly, the interval of all x's, involving the endpoints if need be, for which the power series converges is termed as the interval of conv

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