Assignment (Unit - 11)
1. The height and base of a triangular field a 250 m and 200m respectively. Find the cost of levelling the field at Rs 2.50 per sq m
2. find the altitude of a triangle having base 12 unit and area 48 square units.
3. The area of a parallelogram is 126 sq cm. If one side of the parallelogram is 14 cm, then find its distance from the opposite side.
4. ABCD is a parallelogram. AB = 18 cm, BC = 12 cm, AE is perpendicular to CD, AF is perpendicular to BC. Also AE = 6.4 cm. Find the length of AF.
5. The area of a parallelogram ABCD with AB = 40 cm and the corresponding altitude DE = 18 cm is equal to that of another parallelogram PQRS with side QR = 36 cm. find the altitude of this parallelogram corresponding to the side QR
6. A piece of wire in the form of a rectangle measures 52 cm x 36 cm. It is cut at one place and bent in the form of a square. Find the side of this square.
7. the hypotenuse of a right triangle is 13 cm and one of the sides containing the right angle is 12 cm. Find the area of the triangle
8.Find the base of a triangle with area 16.8 sq cm and height 3.5 cm
9. The perimeter of a rectangle is 200 m. If the length of the rectangle is 80 m find its width.
10. Find the area of the quadrilateral ABCD given in the figure. The diagonal BD is 90 cm and AP , CQ are perpendiculars to BD.
PLEASE ANSWER IT ITS URJENT PLEASE.
Answers
Answered by
2
Answer:
question no. 9 = 20 metre width
Step-by-step explanation:
let the width be = x
=perimeter =2 (l+b)
=200=2(80 + x )
=200 =160+2x
=200-160=2x
=40 =2x
=40/2 =x
=20=x
Answer = width =20m
Answered by
5
1. The height and base of a triangular field a 250 m and 200m respectively. Find the cost of levelling the field at Rs 2.50 per sq m.
Ans :
The area of the triangular field
= [1/2×250×200] sqm.
= 25000 sqm.
Now,
The cost of levelling the field
= [25000 × 2.50] rupees
= 62500 rupees.
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2. find the altitude of a triangle having base 12 unit and area 48 square units.
Ans : altitude = height
1/2 × base × height = 48
or, height = (48 × 2 × 1/12) units
= 8 units.
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