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Heron’S Formula Chapter 12
Quiz 1
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A triangular park ABC has sides 120 m, 80 m and 50 m. A gardener, Dhania has to put a fence all around it and also plant grass inside. The area required and the cost of fencing it with barbed wire at the rate of Rs. 20 per metre leaving a space 3 m wide for a gate on one side will be
0%
A
0%
B
0%
C
0%
D
The area of triangle, whose sides are 15 cm, 25 cm and 14 cm:
0%
A
0%
B
0%
C
0%
D
The area of an equilateral triangle of side 6 cm is
0%
18 cm2
0%
9√3 cm2
0%
56√3 cm2
0%
58√3 cm2
The perimeter of a rhombus is 146 cm. One of its diagonals is 55 cm. The length of the other diagonal and area of the rhombus are
0%
48 cm,2320 cm2
0%
48 cm,1820 cm2
0%
88 cm, 1320 cm2
0%
48 cm, 1320 cm2
A square sheet whose perimeter is 32 cm is painted at the rate of Rs. 5 per cmThe cost of painting is:
0%
Rs.500
0%
Rs.320
0%
Rs.640
0%
Rs.550
If each side of an equilateral triangle is increased by 2 cm, then its area increases by cmThe length of its each side and its area are respectively equal to
0%
A
0%
B
0%
C
0%
D
The area of quadrilateral PQRS, in which PQ = 7 cm, QR = 6 cm, RS = 12 cm, PS = 15 cm and PR = 9 cm:
0%
74.98 cm2
0%
25.25 cm2
0%
75 cm2
0%
68.25 cm2
The base of an isosceles triangle is 10 cm and one of its equal sides is 13 cm. The area of the triangle is
0%
80 cm2
0%
100 cm2
0%
50 cm2
0%
60 cm2
The lengths of a triangle are 6 cm, 8 cm and 10 cm. Then the length of perpendicular from the opposite vertex to the side whose length is 8cm is:
0%
5 cm
0%
4 cm
0%
6 cm
0%
2 cm
The perimeter of an isosceles right angled triangle having an area of 200 cm2 is
0%
68.2 cm.
0%
69.2 cm
0%
88.2 cm
0%
68.5 cm
A carpenter had to make a triangle with sides 5, 6, 5 units. By mistake he made one with sides 5, 8, 5 units. The difference between their areas is:
0%
16 sq units
0%
2 sq units
0%
4 sq units
0%
0 sq units
The area of a right triangle of height 15 m and base 20 m is
0%
160 m2
0%
150 m2
0%
210 m2
0%
216 m2
The perimeter of a right triangle is 144 cm and its hypotenuse measures 65 cm. The other sides and its area are
0%
A
0%
B
0%
C
0%
D
The area of an equilateral triangle of side 14 cm is
0%
A
0%
B
0%
C
0%
D
The sides of a triangle are in the ratio 25 : 17 : 12 and its perimeter is 540m. The area of the triangle is
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12000 m2
0%
5000 m2
0%
9000 m2
0%
10000 m2
The area of an equilateral triangle with perimeter 18x is:
0%
A
0%
B
0%
C
0%
D
The sides of a triangular plot are in the ratio of 3 : 5 : 7 and its perimeter is 300 m. Its area is
0%
2598. 08m2
0%
5598. 08m2
0%
8598. 08m2
0%
6598. 08m2
The area of a right triangle with base 5 m and altitude 12 m is
0%
15 m2
0%
9 m2
0%
50 m2
0%
30 m2
There is a slide in a park. One of its side walls has been painted in some colour with a message "Keep the park green and Clean". If sides of the wall are 15m, 11 m and 6 m, the area painted in colour is________.
0%
20 √6 m2
0%
10 √2 m2
0%
20 √2 m2
0%
20 √3 m2
The area of triangle, whose sides are 15 cm, 25 cm and 14 cm is
0%
A
0%
B
0%
C
0%
D
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