Advertisements
Advertisements
Question
A field is in the shape of a right angled triangle whose base is 25 m and height 20 m. Find the cost of levelling the field at the rate of ₹ 45 per sq.m2
Advertisements
Solution
Area of a right angled triangle = `1/2 xx ("base" xx "height") "unit"^2`
base = 25 m
height = 20 m
∴ Area = `1/2 xx (25 xx 20)`
Area = 250 m2
Cost of levelling per m2 = ₹ 45
∴ Cost of levelling 250 m2
= 250 × 45
= ₹ 11,250
Cost of levelling = ₹ 11,250
APPEARS IN
RELATED QUESTIONS
Find the values of k so that the area of the triangle with vertices (k + 1, 1), (4, -3) and (7, -k) is 6 sq. units.
Find the values of k so that the area of the triangle with vertices (1, -1), (-4, 2k) and (-k, -5) is 24 sq. units.
If D, E and F are the mid-points of sides BC, CA and AB respectively of a ∆ABC, then using coordinate geometry prove that Area of ∆DEF = `\frac { 1 }{ 4 } "(Area of ∆ABC)"`
Prove that the points (a, 0), (0, b) and (1, 1) are collinear if `1/a+1/b=1`
If G be the centroid of a triangle ABC and P be any other point in the plane, prove that PA2+ PB2 + PC2 = GA2 + GB2 + GC2 + 3GP2.
Find the area of ΔABC whose vertices are:
A(10,-6) , B (2,5) and C(-1,-3)
In ∆PQR, PR = 8 cm, QR = 4 cm and PL = 5 cm. 
Find:
(i) the area of the ∆PQR
(ii) QM.
The value of the determinant `abs((1,"x","x"^3),(1,"y","y"^3),(1,"z","z"^3))` is ____________.
Find the coordinates of the point Q on the x-axis which lies on the perpendicular bisector of the line segment joining the points A(–5, –2) and B(4, –2). Name the type of triangle formed by the points Q, A and B.
The area of a trapezium is 475 cm2 and the height is 19 cm. Find the lengths of its two parallel sides if one side is 4 cm greater than the other.
