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Area Problems

Area Problems
Find the area of a rectangle having 15m length and 8m breadth.

120 sq m
115 sq m
111 sq m
125 sq m

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Required area = Length x Breadth= 15 x 8 = 120 sq m

Area Problems
Square units 13 by 9 of an office area is

97
117
127
107

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Square units 13 by 9 of an office means office of length 13 units and breadth 9 units. Now its area is 13x 9 = 117 square units or units square.

Area Problems
The base of right-angled triangle is 5 meters and hypotenuse is 13 meters . Its area will be?

25m2
28 m2
30m2
None of these

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Altitude = ?(13)2 - (5)2= ?144 = 12m ? Area of the triangle = (5 x 12 ) / 2 m2= 30m2

Area Problems
If the circumference of a circle is the 352 meters, then its area in m square is?

5986
6589
9856
8956

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

circumference = 2?r = 2 x (22 / 7) x r = 352? r = (352 x 7) / (22 x 2) =56 cmNow area = ?r2 = (22 / 7) x 56 x 56 m2= 9856 m2

Area Problems
If the diameters of a circle is increased by 100% . Its area is increased by?

300%
400%
100%
200%

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Original area = ?(d/2)2= (?d2) / 4New area = ?(2d/2)2= ?d2Increase in area = (?d2 - ?d2/4)= 3?d2/4? Required increase percent = [(3?d2)/4 x 4/(?d2) x 100]%= 300%

Area Problems
Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 9856 sq meters.

76m
56m
16m
14m

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

clearly the cow will graze a circular field of area 9856 sq m and radius equal to the length of the rope.
Let the length of the rope be r mts  then,
r2 = 9856
r2 = (9856 × 7) / 22 = 3136
r = 56 m

MORE MCQ ON Area Problems

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