51. Length of the boundary is called
(A) area
(B) volume
(C) perimeter
(D) plane
Answer:
(C) perimeter
Explanation:
In geometry, the perimeter is defined as the total continuous length of the outside boundary of any closed two-dimensional figure.
52. 101×11= ?
(A) 1111
(B) 1120
(C) 1102
(D) 2211
Answer:
(A) 1111
Explanation:
Multiplying 101 by 11 can be done simply: , and . Adding them together () gives 1111.
53. A baby elephant drinks 12 L of milk in a day. How many litres of milk he drinks in a year?
(A) 4380 L
(B) 3600 L
(C) 3650 L
(D) 1440 L
Answer:
(A) 4380 L
Explanation:
A standard non-leap year has 365 days. Multiplying the daily consumption by the number of days () equals 4380 Liters.
54. How many mm will be in 0.9 cm?
(A) 90 mm
(B) 900 mm
(C) 9 mm
(D) 0.9 mm
Answer:
(C) 9 mm
Explanation:
There are 10 millimeters (mm) in 1 centimeter (cm). Therefore, to convert, you multiply by 10: mm.
55. If the perimeter of a square carrom board is 320 cm then its area is
(A) 3200 Sq cm
(B) 640 Sq cm
(C) 6400 Sq cm
(D) 960 Sq cm
Answer:
(C) 6400 Sq cm
Explanation:
A square has 4 equal sides. If the perimeter is 320 cm, each side is cm. The area of a square is , so Sq cm.
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