Question
The total area of a circle and a square is 6350
cm2, the diameter of the circle is 70cm, what is the difference between the circumference of the circle and perimeter of a square?Solution
Radius of a circle = 35cm Side of a square = a According to the question, π r2 + a2 = 6350 22/7 × 35 × 35 + a2 = 6350 3850 + a2 = 6350 a = 2500 a = 50cm Required difference = 2 πr – 4a = 2 × 22/7 × 35 – 4 × 50 = 220 – 200 = 20 cm
Find smallest number divisible by 12, 15, 20, and 27.
One baker house has to make 600 cakes and another one 750 cakes during the same period of time. In the first house, the order was ready 5 days ahead of ...
28% of a certain number is added to 82% of the same number, resulting in 125% of 484. If 150 is subtracted from this number, what is 35% of the resultin...
When the digits of a two-digit number are interchanged, the new number becomes 23 more than 150% of the original number. If the sum of the digits is 8, ...
The sum of a positive number 'A' and its square is 90. Find the value of (A2 - 7A).
How many even divisors does 360 have?
Which of the following is a prime number?
After swapping its digits, a two-digit number becomes 17 less than 200% of the original number. The sum of the digits is 8. Find the original number.
'N' is the largest three-digit number that leaves 2 as a remainder when divided by 9, 12 and 5, Find the sum of digits of 'N'.
Suppose, (√(5a+9) )+ (√(5a-9)) = 3(2+√2), then √(10a+9) will be equal to?
Relevant for Exams:
