## Areas – Aptitude Questions and Answers Online Test

**Areas aptitude questions and answers section with explanation. Practice online test for various interview, competitive and entrance exams.**

**1. The cross-section of a cannel is a trapezium in shape. If the cannel is 10 m wide at the top and 6 m wide at the bottom and the area of cross-section is 640 sq m, the depth of cannel is?**

A.20 m B.60 m C.40 m D.80 m__Answer:__ D**Explanation:**

1/2 * d (10 + 6) = 640

d = 80**2. Find the area of circle whose radius is 7m?**

A.124 sq m B.154 sq m C.145 sq m D.167 sq m__Answer:__ B**Explanation:**

22/7 * 7 * 7 = 154**3. Find the cost of fencing around a circular field of diameter 28 m at the rate of Rs.1.50 a meter?**

A.Rs.150 B.Rs.132 C.Rs.100 D.Rs.125__Answer:__ B**Explanation:**

2 * 22/7 * 14 = 88

88 * 1 1/2 = Rs.132**4. The radius of a circular wheel is 1.75 m, how many revolutions will it make in traveling 1 km?**

A.1000 B.2000 C.3000 D.4000__Answer:__ A**Explanation:**

2 * 22/7 * 1.75 * x = 11000

x = 1000**5. If the wheel is 14 cm then the number of revolutions to cover a distance of 1056 cm is?**

A.15 B.10 C.14 D.12__Answer:__ D**Explanation:**

2 * 22/7 * 14 * x = 1056 => x = 12**6. The radius of a semi circle is 6.3 cm then its perimeter is?**

A.35.4 cm B.32.4 cm C.32 cm D.30 cm__Answer:__ B**Explanation:**

36/7 r = 6.3 = 32.4**7. The perimeter of a semi circle is 144 cm then the radius is?**

A.25 cm B.28 cm C.30 cm D.35 cm__Answer:__ B**Explanation:**

36/7 r = 144 => r = 28**8. The length of rectangle is thrice its breadth and its perimeter is 96 m, find the area of the rectangle?**

A.432 sq m B.356 sq m C.452 sq m D.428 sq m__Answer:__ A**Explanation:**

2(3x + x) = 96

l = 36 b = 12

lb = 36 * 12 = 432**9. A rectangular grass field is 75 m * 55 m, it has a path of 2.5 m wide all round it on the outside. Find the area of the path and the cost of constructing it at Rs.2 per sq m?**

A.675, Rs.1350 B.575, Rs.1350 C.1350, Rs.675 D.None__Answer:__ A**Explanation:**

Area = (l + b +2d) 2d

= (75 + 55 +2.5 * 2) 2*2.5 => 675

675 * 2 = Rs.1350**10. The length of a rectangle is increased by 25% and its breadth is decreased by 20%. What is the effect on its area?**

A.Remains same B.5% decrease C.5% increase D.10% increase__Answer:__ A**Explanation:**

100 * 100 = 10000

125 * 80 = 10000

No change