The height of a triangle is increased by 40%. what can be the maximum ...
Let the height be h and base be b.
Height increases 40%,So new height = h + 40% of h = 7/5*h
Area of triangle = (� * h * b)
Area increases by 60%. so, new area,
= (� * h * b) + 60% of (� * h * b)
New area,= 1/2*7/5*x = 8/5*1/2*b*h
which will result into x = 8/7*b
So, base will increase by 1/7th of b = 14.28%.
This question is part of UPSC exam. View all CAT courses
The height of a triangle is increased by 40%. what can be the maximum ...
Solution:
Given:
- The height of a triangle is increased by 40%.
- The maximum increase in length of the base is to be found so that the increase in area is restricted to a maximum of 60%.
To solve this problem, we can use the formula for the area of a triangle:
Area = 1/2 * base * height
Let the original height of the triangle be h and the original base be b.
New height = 1.4h (40% increase in height)
New area = 1/2 * b * 1.4h = 0.7bh
We want the increase in area to be restricted to a maximum of 60%.
Therefore,
0.7bh - bh ≤ 0.6bh
0.1bh ≤ 0.7bh
0.6bh ≤ 0
This is not possible, so there is no maximum percentage increase in length of the base that can restrict the increase in area to a maximum of 60%.
Explanation:
- We begin by using the formula for the area of a triangle, which is given as 1/2 * base * height.
- We are given that the height of the triangle is increased by 40%, which means that the new height is 1.4 times the original height.
- We can then use this information to find the new area of the triangle, which is 1/2 * base * 1.4h.
- We want the increase in area to be restricted to a maximum of 60%, which means that the new area can be at most 1.6 times the original area.
- We set up an inequality to represent this condition and then simplify it.
- We find that the inequality is not possible, which means that there is no maximum percentage increase in length of the base that can restrict the increase in area to a maximum of 60%.
Therefore, the answer is that there is no maximum percentage increase in length of the base that can restrict the increase in area to a maximum of 60%.
To make sure you are not studying endlessly, EduRev has designed CAT study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in CAT.