If the perimeter of a semicircle is 36 cm, then find its area (in cm2).
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What is the area (in sq cm) of a rectangle of perimeter 48 cm and breadth 10 cm?
Which of the following quadratic equations has real roots?
If sinC + sinD =X, then the value of X is?
A can do a work in 24 days and B in 40 days. If they work on it together for 10 days, then what fraction of work is left?
A mixture of alcohol and water contains 7% alcohol. How much mixture (in litres) is required to get 357 litres of alcohol?
A certain principal is invested in a scheme of compound interest. The amount obtained after 1 year is Rs 2400 and the amount obtained after 2 years is Rs 2880. What is the rate of interest (in percentage)?
If a sum of money doubles itself in 8 yrs, then the interest rate in percentage is ?