Advertisements
Advertisements
Question
The radius of a circle is 7ab – 7bc – 14ac. Find the circumference of the circle. `(pi = 22/7)`
Advertisements
Solution
We have, radius of the circle = 7ab – 7bc – 14ac = r ...[say]
We know that,
∵ The circumference of the circle = 2πr
= `2 xx 22/7 xx (7ab - 7bc - 14ac)`
= `44/7 xx 7(ab - bc - 2ac)`
= 44[ab – c(b + 2a)]
APPEARS IN
RELATED QUESTIONS
Factorise : 16p4 – 1
(a + b)(a – b) = a2 – b2
Using suitable identities, evaluate the following.
9.8 × 10.2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
25ax2 – 25a
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`1/36a^2b^2 - 16/49b^2c^2`
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
(x + y)4 – (x – y)4
Factorise the expression and divide them as directed:
(3x2 – 48) ÷ (x – 4)
The base of a parallelogram is (2x + 3 units) and the corresponding height is (2x – 3 units). Find the area of the parallelogram in terms of x. What will be the area of parallelogram of x = 30 units?
Find the value of `(6.25 xx 6.25 - 1.75 xx 1.75)/(4.5)`
Find the value of `(198 xx 198 - 102 xx 102)/96`
