Q. 174.0( 4 Votes )
Find the cost of leveling the ground in the form of a triangle having its side as 70 cm, 50 cm, and 60 cm, at Rs. 7 per square metre.
Answer :
Given: Sides of a triangle are 70 cm, 50 cm, and 60 cm
Cost of leveling the ground: Rs. 7 per square metre
To Find: The cost of leveling the ground.
Concept Used:
If sides of a triangle are a, b, and c, then area of a triangle is given by:
Where s = semiperimeter of the triangle
Assumption: Let the sides of triangle be,
a = 70 cm
b = 50 cm
c = 60 cm
Explanation:
s = 90 cm
Area = 600√6 cm2.
1m2 = 104 cm2
600√6 cm2
Cost of leveling of 1 m2 = Rs. 7
Cost of leveling of 
Hence, the cost of leveling of the ground is Re. 1.
Rate this question :
NCERT | Heron's Formula49 mins
Heron's Formula43 mins
NCERT | Master all Question Types of Heron's Formula46 mins
Quiz | Heron's Formula44 mins
NCERT | IMP Qs on Herons Formula44 mins
Heron's formula32 mins
Champ Quiz | Know About Heron's Formula53 mins
Smart Revision | Heron's Formula39 mins
Champ Quiz | Heron's Formula41 mins
RD Sharma | IMP Qs from Heron's Formula45 mins
A piece of land is in the shape of a rhombus ABCD in which each side measures 100m and diagonal AC is 160m long. Find the area of the rhombus.
The question consists of two statements namely, Assertion (a) and Reason (R). Please select the correct answer.
Find the area of the trapezium PQRS with height PQ given in Fig. 12.3
