Question
A rectangle has a length to breadth ratio of 7:5. The
length is increased by 15% without any change to the breadth, resulting in an 84 m² increase in the rectangle's area. What is the perimeter of the original rectangle?Solution
Let length and breadth of the rectangle is 7x metres and 5x metres respectively. Area of rectangle = 7x × 5x = 35x2 m2 When length is increased, area of the rectangle = 1.15 × 7x × 5x = 40.25x2 m2 According to question; 40.25x2 – 35x2 = 84 Or, 5.25x2 = 84 Or, x2 = 16 x = 4 Perimeter of the rectangle = 2 × (7 + 5) × 4 = 96 metres
Select the set in which the numbers are related in the same way as are the numbers of the following set.
(4, 14, 44)
Select the option that is related to the third number in the same way as the second number is related to the first number and the sixth number is relate...
Select the option in which the numbers are related in the same way as are the numbers in the given set.
(109, 114, 139)
48 6 3
x 12 11
If ‘ x' is the resultant of the first row, what is the resultant of the second row?
...How many pair of digits in forward and backward direction are there in the number “9257364” that has as many numbers between them as in the ...
Select the number-pair that is different from the other three.
Select the letter from among the given options that can replace the question mark (?) in the following series.
P, N, J, H, ?
A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
13, 38, 150, _____, 4478, 31341.
Select the option that is related to the third number in the same way as the second number is related to the first number.
25:16::41:?
The average salary of A, B and C is Rs. 22000 while average salary of B, C and D is Rs. 25000. If the average salary of D be 2 times of that of ...
Relevant for Exams:
