Advertisements
Advertisements
प्रश्न
Diagram of the adjacent picture frame has outer dimensions = 24 cm × 28 cm and inner dimensions 16 cm × 20 cm. Find the area of each section of the frame, if the width of each section is same.
Advertisements
उत्तर
Area of ABFE
= `1/2` (AB + EF) × 4 cm2
= `1/2` (24 + 16) × 4 cm2
= `1/2` × 40 × 4 cm2
= 80 cm2
Also, Area of GHDC = Area of ABFE
= 80 cm2
Area of AEGC = `1/2` (EG + AC) × 4cm2
= `1/2 (20 + 28)` × 4cm2
= 96 cm2
Also, Area of AEGC = BFHD = 96 cm2 Area of EFHG
= HG × HF
= 16 × 20 cm2
= 320 cm2
APPEARS IN
संबंधित प्रश्न
A rectangular plot of land measures 45 m x 30 m. A boundary wall of height 2.4 m is built all around the plot at a distance of 1 m from the plot. Find the area of the inner surface of the boundary wall.
How many tiles, each of area 400 cm2, will be needed to pave a footpath which is 2 m wide and surrounds a grass plot 25 m long and 13 m wide?
Calculate the area of the figure given below:
Which is not drawn scale.
The figure given below shows the cross-section of a concrete structure. Calculate the area of cross-section if AB = 1.8 cm, CD = 0.6 m, DE = 0.8 m, EF = 0.3 m and AF = 1.2 m.
The area of a rhombus is 216 sq. cm. If it's one diagonal is 24 cm; find:
(i) Length of its other diagonal,
(ii) Length of its side,
(iii) The perimeter of the rhombus.
The rate for a 1.20 m wide carpet is Rs. 40 per meter; find the cost of covering a hall 45 m long and 32 m wide with this carpet. Also, find the cost of carpeting the same hall if the carpet, 80 wide, is at Rs. 25. Per meter.
The perimeter of a semicircular plate is 108 cm. find its area.
Find the diagonal of a quadrilateral whose area is 756cm2 and the perpendicular from the opposite vertices are 17cm and 19cm.
Let P(11, 7), Q(13.5, 4) and R(9.5, 4) be the midpoints of the sides AB, BC and AC respectively of ∆ABC. Find the coordinates of the vertices A, B and C. Hence find the area of ∆ABC and compare this with area of ∆PQR.
If vertices of a quadrilateral are at A(– 5, 7), B(– 4, k), C(– 1, – 6) and D(4, 5) and its area is 72 sq. units. Find the value of k.
