Aptitude Questions and Answers
The difference between the length and breadth of a rectangle is 23 m. If its perimeter is 206 m, then its area in m2 is
The difference between the length and breadth is = 23 m.
i.e., (l - b) = 23-------- eq.(1)
And perimeter = 206 m.
i.e., 2(l + b) = 206
l + b = 103---------eq.(2)
By solving eq.(1) and (2), we get length(l) = 63 and breadth(b) = 40.
So, Area = ( l x b ) = (63 x 40) m2 = 2520 m2.
What will be the cost of gardening 1 meter broad boundary around a rectangular plot having perimeter of 340 meters at the rate of Rs.10 per square meter?
Perimeter of the boundary = 2(L + b) = 340
Area of the boundary = [(L + 2)(b + 2) - Lb]
= [Lb + 2L + 2b + 4 - Lb]
= 2(L + b) + 4
= 340 + 4
=344.
Cost of gardening = Rs. (344 X 10)
= Rs.3440
2 meters broad pathway is to be constructed around a rectangular plot on the inside. The area of the plot is 96 sq.m. The rate of construction is Rs.50 per square meter. Find the total cost of the construction?
Area of the plot = Lb = 96 sq. m.
Area of pathway = [(L - 4)(b - 4) - Lb]
= [Lb - 4L - 4b +16 - Lb]
= 16 - 4(L + b)
And here we don not have value of (L + b)
So,Data is inadequate.
