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Let the radius of the circle be r cm. So, the length of the rectangle = 1.25r cm and the breadth of the rectangle = 0.90r cm Given that, ⇒ πr2 – 1.25r × 0.90r = 290.16 ⇒ 3.14r2 – 1.125r2 = 290.16 ⇒ r2 = 290.16/2.015 ⇒ r2 = 144 ⇒ r = 12 Length = 1.25 × 12 = 15 cm Breadth = 0.90 × 12 = 10.8 cm Perimeter of rectangle = 2(15 + 10.8) = 51.6 cm
Two numbers are less than a third number by 25% and 31% respectively. Find the percent by which the second number is less than the first.
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The population of a city is decreased by 20% in the first year and then increased by 30% in the second year. Find the population of the city at the end...
The income of ‘A’ increases by 30% every year. If his income 3 years hence from now will be Rs. 34273.2, then find his income a year before from now...
Ravi allocated 60% of his income to expenses in May. In June, his savings increased by 20%, amounting to Rs. 5760. Calculate Ravi's total income for the...
Rajesh spent 46% of his monthly income on food and 54% of the remaining of study. If total monthly savings (after spending on food and study) of Rajesh ...
A man donated 20%, 15% and 24% of his income to three NGOs ‘A’, ‘B’ and ‘C’, respectively. They spent 75%, 80% and 50% of respective sums re...
Rajesh spent 47% of his monthly income on food and 53% of the remaining of study. If total monthly savings (after spending on food and study) of Rajesh ...
Amit scored 80 marks in subject X. He scored 60% marks in subject B and Y marks in subject D. Maximum marks in each subject was 300. The overall percent...