CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

Side of an equilateral triangle expands at the rate of 2 cm/s. The rate of increase of its area when each side is 10 cm, is




  1. 10 cm2/sec

  2. 5 cm2/sec


Solution

The correct option is B



Let x be the side and A be the area of equilateral triangle at time t.
Then.A=34x2
dAdt=32xdxdtdAdt=32×10×2=103[x=10 anddxdt=2]
Hence (b) is the correct answer.

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
QuestionImage
QuestionImage
View More...


People also searched for
QuestionImage
QuestionImage
View More...



footer-image