Question
The cost of fencing a rectangular garden at Rs. 10/metre
is Rs. 1000. If the ratio of the length to breadth is 3:2, find the area of the garden.Solution
Let the length and breadth be 3x metres and 2x metres respectively.
According to the question,
2 × (3x + 2x) = 1000 / 10
Or, 2 × 5x = 100
Or, 10x = 100
Or, x = 10 metres
Therefore, area = 3x × 2x = 6x² = 6 × 100 = 600 m²
Average age of a class of 33 students is 14 years. Average age of the class is increased by 18 months if the age of the teacher is included. Find...
The average weight of 36 students in a class is 62 kg. When two new students having weights (m + 8) kg and (m − 6) kg joined, the average weight dropp...
The average wage of a group of 20 labourers is Rs. 500. If 4 persons receiving average wage of Rs. 360 leave the group and 2 persons receiving average w...
Bag A and Bag B contain balls in the ratio of 7:6, while Bag B and Bag C have balls in the ratio of 2:3. If the average number of balls across all three...
The average number of books read by 40 Indian students in a year is 30. If the books read by their librarian are included, the average increases by 2 bo...
The average age of A and B is 15 years. If A is to be replaced by C, the average would be 14 years. The average age of C and A is 16 years. Find the age...
The average age of Renu and Rekha after three years will be 30 years, while the average age of Priya and Renu is currently 32 years. Additionally, the a...
Average weight of all the people in a group is 66 kg. When two people of weight 72 kg and 84 kg left the group, average weight reduces by 1.2 kg. Find t...
Average marks scored by Vineet in five subjects are 72. The average marks scored by him (excluding his highest and lowest marks) are 56 and lowest marks...
There are three distinct numbers ‘u’, ‘v’ and ‘w’. If, u = 240, (u + v) = 540 and (w – v) = 60, then find the average of u, v and w.
...
