Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

JEE Class main Answered

Q-6,8
question image
Asked by gujjarrudi | 09 May, 2020, 03:20: PM
answered-by-expert Expert Answer
Question:- The length and breadth of a square are increased by 60% and 70% respectively. The rectangle thus formed is reshaped into a circle. What is the percentage increase in area from square to the circle?
Solution:
Let a be the side of the square.
Area of the square = a2
Dimensions of the rectangle thus formed are:
Length of the rectangle = a + 60a/100 = 1.6a
Breadth of the rectangle = a + 70a/100 = 1.7a
The rectangle is reshaped into a circle
Area of circle = Area of rectangle = 1.6a x 1.7a = 2.72a2
Increase in the area = 2.72a2 - a2 = 1.72a2
Percentage increase in the area from square to the circle = (1.72a2/a2) x 100 = 172%
Answered by Renu Varma | 10 May, 2020, 03:47: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar
Answered Unanswered My Questions My Answers
JEE main - Maths
what is real number
question image
Asked by praveenjeevanagi | 01 Oct, 2023, 09:19: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
In a survey conducted among 250 ipl fans. 120 students support csk, 80 student support rcb, and 30 students support both csk and rcb. If a student is selected at random, what is the probability that the selected student neither support csk and rcb.
Asked by harshpunia109 | 28 Jun, 2023, 07:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
determinant
question image
Asked by sankar.lolla | 18 Dec, 2022, 10:57: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
Q) Find the range of f(x) = x + 1/x Ans) See the image which I have uploaded.. I have just broken the eqn into √x² + 1/√x² +2 -2 ..and have formed the identity (a+b)² and the range is coming  (-∞, 2 ] U [ -2, ∞ ) which is wrong.. the correct range is coming from (a-b)² which is (-∞, -2 ] U [ 2, ∞ ). My Doubt- Why (a+b)² is not giving the correct range? Request- Please send the solution using (a+b)². I've attached an image and let me know if I'm wrong somewhere or why the correct solution isn't coming by using (a+b)². Thanks, Samit  Future Top 50 ranker in JEE ADVANCE
question image
Asked by samithatty | 01 Dec, 2022, 10:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
.
question image
Asked by swayamagarwal2114 | 01 Aug, 2022, 01:47: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
f / [- 2, 2] -> [- 2, 2], g / [- 2, 2] -> [0, 4] are two functions defined as f(x)= -2,-2
question image
Asked by chinna99tv | 14 Jul, 2022, 07:08: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
domain of ln{x} where {}is the fractional part
Asked by farhanaedavath | 22 Jun, 2022, 07:43: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
please answer
question image
Asked by rohan1234rathor | 07 Jun, 2022, 08:20: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
solve questions 2+2
Asked by vijaysmeeqourse | 30 Mar, 2022, 05:45: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
467+467
Asked by quraishihuda88 | 24 Mar, 2022, 08:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt

Be a Top Scorer in the Exam with Test Series and Test Generator!

Enrol Now
×