B.C.A.
Question : If $a^2+b^2+c^2=14$ and $a+b+c=6$, then the value of $(ab+bc+ca)$ is:
Option 1: 11
Option 2: 12
Option 3: 13
Option 4: 14
Correct Answer: 11
Solution : Given: $a^2+b^2+c^2=14$ and $a+b+c=6$. On squaring the given equation $a+b+c=6$, we get, $(a+b+c)^2=6^2$ ⇒ $a^2+b^2+c^2+2(ab+bc+ca)=36$ Substitute the value of $a^2+b^2+c^2=14$ in the above equation and we get, ⇒ $14+2(ab+bc+ca)=36$ ⇒ $2(ab+bc+ca)=22$ ⇒ $(ab+bc+ca)=11$ Hence, the correct answer is 11.
Dear Aspirant!
Yes it is possible to purse you BCA (Bachelor of Computer Applications) even if you take admission from science to commerce after failing in 11th grade. However, admission requirements can vary depending on the institution in which you want to take admission. You need to choose the specific
Question : The external diameter of an iron pipe is 20 cm and its length is 12 cm. If the thickness of the pipe is 1 cm, find the surface area of the pipe (take $\pi=\frac{22}{7}$ ) correct to two places of decimal.
Option 1: 1,662.67 cm2
Option 2: 1,552.57 cm2
Option 3: 1,442.48 cm2
Option 4: 1,772.76 cm2
Correct Answer: 1,552.57 cm2
Solution : The external radius of the iron pipe, R = $\frac{20}{2}$ = 10 cm Internal radius of the iron pipe, r = 10 – 1 = 9 cm Height, h = 12 cm According to the concept, Total surface area = $2\pi Rh +
Hello,
Yes, anyone can pursue BCA externally. Many universities, colleges or institutions offer distance education courses for BCA, whicb allows students to study and earn the degree without attending regular classes on campus.
External BCA programs provide flexibility for working professionals or those who may not be able to attend
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