Question
If the circumference of a circle is 264 cm then find the
area of the circle?Solution
Let the radius of a circle = (r) cm Circumference of circle = 2Οr According to the question β 2 x Ο x r = 264 β 2 x (22/7) x r = 264 β r = (264 x 7)/(22 x 2) β r = 42 cm Area of circle = Οr2 Area of circle = 22/7 x 42 x 42 Area of circle = 5544 cm2
The ratio of the incomes of Vineet and Vidya is 8:3 respectively. Vineet saves 30% of his income while Vidya saves 20% of his income. The sum of their e...
- If the mean proportion of 1.21 and 0.25 is 'k', then find the value of '10k'.
Three numbers βPβ, βQβ and βRβ are such that βPβ is 25% more than βQβ and βRβ is equal to the average of βPβ and βQβ. I...
Population of a town is 1,20,000. If number of the male increase by 7% and Females increase by 10% then the population of town would increase by 9.5 %. ...
Total population of city P and Q is 4420 and 5940 respectively. If the ratio of number of males to females in city is P and Q is 8:5 and 5:4 respectivel...
What is the mean proportion between 12 and 27?
βXβ, βYβ and βZβ rented a taxi for a trip. The taxi driver charges a fixed amount per kilometer. If βXβ, βYβ and βZβ travelled ...
The ratio of the number of girls to the number of boys in a school of 990 students is 2 : 7. If 20 boys left the school, find how many new girls may be ...
The cost of diamond varies directly as the square of its weight. A diamond broke into four pieces with weights in the ratio 1 : 3 : 4 : 7. if the loss i...
Find the fourth proportion of (3k + 3), (6k + 6) and (9k + 9). (Note: 'k' is the largest single-digit composite number.)
