424
Q:

# If each edge of a cube is increased by 50%, find the percentage increase in Its surface area

 A) 125% B) 150% C) 175% D) 110%

Explanation:

Let the edge = a cm

So increase by 50 % = a + a/2 = 3a/2

Total surface Area of original cube = $6a2$

TSA of new cube = $63a22$ =$69a24$=  $13.5a2$

Increase in area = $13.5a2-6a2$ =$7.5a2$

$7.5a2$ Increase % =$7.5a26a2×100$ = 125%

Q:

The volume of a sphere is 179.67 cub.cm. Find its diameter (in cm).

 A) 3.5 B) 14 C) 7 D) 10.5

Explanation:

0 40
Q:

What is the sum of the measures of all the interior angles of a regular polygon of 5 sides?

 A) 720 B) 1080 C) 1260 D) 540

Explanation:

0 50
Q:

Consider the following two triangles as shown in the figure below. Choose the correct statement for the above situation. A) 1 B) 2 C) 3 D) 4

Explanation:

0 43
Q:

Find the total surface area (in cm²) of a right circular cone of diameter 14 cm and slant height 10 cm.

 A) 374 B) 570 C) 428 D) 524

Explanation:

0 23
Q:

The length of the diameter of the circle is 10 cm and length of the chord drawn in a circle is 6 cm. Find the distance (in cm) of chord from the center.

 A) 10 B) 8 C) 6 D) 4

Explanation:

0 41
Q:

Find the curved surface area (in cm2) of a right circular cylinder of diameter 7 cm and height 6 cm.

 A) 132 B) 110 C) 92 D) 154

Explanation:

0 45
Q:

If the measure of the exterior angle of a regular polygon is 72 deg then how many sides does it have?

 A) 6 B) 8 C) 9 D) 5

Explanation:

0 50
Q:

In triangle ABC, O is the orthocenter and angle BOC is 120 deg. Calculate angle BAC. A) 30 deg B) 40 deg C) 60 deg D) 80 deg