Question
A circular pond is surrounded by a path 2 meters wide.
The diameter of the pond is 28 meters. Find the cost of constructing the path at ₹140 per square meter.Solution
Radius of the pond = 28 / 2 = 14 meters. Outer radius (including path) = 14 + 2 = 16 meters. Area of the path = Area of outer circle - Area of the pond. Area of outer circle = π(16²) = (22/7) × 256 Area of the pond = π(14²) = (22/7) × 196 Area of the path = (22/7) × (256 – 196) m². = 60*22/7 Cost = 60*22/7 × 140 = ₹26,400 Correct answer: b) ₹26,400.
What is the value of √25% =?
Monthly income of P is Rs.19000 and his monthly savings is Rs.9500. If his monthly income is decreased by 30% and monthly expenditure is decreased by 20...
- Neha spent 30% of her income on education and out of the remaining amount, she spent 25% on travel, 20% on health, 15% on entertainment, and saved Rs. 2000...
If decreasing 90 by k% gives ihe same result as increasing 60 by k%, then k% of 120 is how much per cent of [(K + 20)% of 150]
The respective ratio of monthly income of A to monthly income of B is 6:7, and A’s saving is (100/7)% more than B’s saving. Find the expenditure of ...
In a school, 60% of the students pass and 30 fail. The number of students appearing from another school is 25 more and 20 more students pass than the f...
Population of a village is three lakh out which 40% were male and the rest were females. The male population earned a profit of 6% and the female popula...
A student scored 75 marks in Mathematics, 85 marks in Science, and 90 marks in English out of a total of 100 marks in each subject. If the weightage of ...
A gave 60% of amount to B. B gave 20% of amount received from A to C. If amount received by C from B is Rs.192, then find the amount received by B from A.
In an examination, 4 marks are given for each correct answer and 1 mark is deducted for each wrong answer. If a candidate solved 75 questions and got 12...
