Question

From a rectangular piece of cardboard (of length = 16 cm and breadth = 10 cm) a square of length 8 cm is cut out. What is the area of the crdboard left?

The side of a rhombus 25 cm and one of the diangonals is 14 cm. The area of the rhombus is

In a trapezium ABCD, AB//CD. AB=3 cm and CD= 7 cm and the distance between AB and CD is 4cm. Find the area.(Show complete working).

Calculate the value of h where the given quadrilateral is a parallelogram:


Find the area enclosed between two concentric circles whose radii are 8cm and 6 cm(find area of the white part in the diagram)

Answer 1

answers

144 cm

Explanation

Length of sheet = 16 cm

Breadth of sheet = 10 cm

Side of each square = 2 cm

∴ Inner length = 16−2×2=16−4=12cm

Inner length =10−2×2=10−4=6cm

By folding the sheet, the length of the container = 12 cm, breadth = 6 cm, height = 2 cm

∴ Volume of the container = (l×b×h)

Answer 2

Length of sheet = 16 cm

Breadth of sheet = 10 cm

Side of each square = 2 cm

∴ Inner length = 16−2×2=16−4=12cm

Inner length =10−2×2=10−4=6cm

By folding the sheet, the length of the container = 12 cm, breadth = 6 cm, height = 2 cm

∴ Volume of the container = (l×b×h)