Advertisements
Advertisements
Question
The diagonal of a rectangular board is 1 m and its length is 96 cm. Find the area of the board.
Advertisements
Solution
Length of diagonal (AB) = 96 cm
Diagonal (AC) = 1 m = 100 cm
In right-angled triangle ABC,
By Applying Pythagoras Theorem,
(AC)2 = (AB)2 + (BC)2
= (100)2 = (96)2 + BC2
10000 = 9216 = BC2
10000 − 9216 = BC2
`sqrt784` = BC
∴ BC = 28 cm
Area of the rectangular board
= l × b or AB × BC
= 96 × 28
= 2688 cm2
APPEARS IN
RELATED QUESTIONS
Let ABC be a triangle of area 24 sq. units and PQR be the triangle formed by the mid-points of the sides of Δ ABC. Then the area of ΔPQR is
ABCD is a parallelogram. P is any point on CD. If ar (ΔDPA) = 15 cm2 and ar (ΔAPC) = 20 cm2, then ar (ΔAPB) =
The figure obtained by joining the mid-points of the adjacent sides of a rectangle of sides 8 cm and 6 cm is ______.
Find the area of a rectangle whose length = 24 cm breadth =180 mm
Which has the bigger area - one of your footprints or the page of this book?
Which has the smaller area - two five-rupee notes together or a hundred rupee notes?
Altogether how many squares can be arranged on it?
Measure the length of the floor of your classroom in meters. Also, measure the width.
- So how many children can sit in one square meter?
Find the area of the following figure by counting squares:
Find the area of the following figure by counting squares:
