Subject: General Aptitude · Chapter: Area · Exam: · Marks: · Difficulty:
Two circular wheels of the same radius $r$ have their central hubs at a distance of $a$ from one another. The minimum length of a fan belt which will pass around both the wheels is $2(a+\pi r)$
(b)$a+\frac{\pi r}{2}$
(c)$2 a+\pi r)$
(d)$\frac{a+\pi r}{2}$
Answer
Answer (as printed): A
Explanation
Required length $=2 a+$ Sum of circumferences of 2 semicircles of radius $r=2 a+2 \pi r=2(a+\pi r)$.
Explanation as extracted from the printed page; notation may be imperfect.