Subject: General Aptitude · Chapter: Area · Exam: · Marks: · Difficulty:
The sides of a triangle are 6 cm, 11 cm and 15 cm.
(a)25%
(b)50% 5
(c)217 cm The radius of its incircle is 366. If the radius of a circle is increased by 75%, then its circumference will increase by 4 2 75% cm
(d)100% 5 2 367. When the circumference of a toy balloon is increased 6 2 cm 4 from 20 cm to 25 cm, its radius is increased by
Answer
Answer (as printed): C
Explanation
We have : a = 6, b = 11, c = 15. s = (6 + 11 + 15) = 16. 2 Area of the triangle, ∆ = 16 × 10 × 5 × 1 = 20 2 cm 2 . ∆ 20 2 5 2 Radius of incircle = = = cm. s 16 4 Product of sides
Explanation as extracted from the printed page; notation may be imperfect.