08. The area of trapezium is 1080cm?, if the length of its parallel side by 55cm and 35cm find the distanc
between them?
19. Find the volume, T.S.A. and Lateral surface area of cuboid which is 8m long. 6m wide and 3.5
/
height.
רן
Answers
Step-by-step explanation:
A=
2
h(a+b)
A=1080cm
2
, a=55cm,b=35cm
Substituting in above equation, we get h=
55+35
2×1080
=24
Answer:
Q 8 = 24 cm
Q 19
Volume of cuboid = 168 m^3
T.S.A of cuboid = 1150 m
L.S.A = 98 m
Step-by-step explanation:
Q 8
Given,Area of trapezium = 1080 cm
Length of parallel sides = 55 cm and 35 cm
Height ?
Area of trapezium =1/2 sum of parallel sides * height
1080 = 1/2 (55+35) * Height
1080 * 2 = 90 * Height
2160 = 90 * Height
2160/90 = Height
Height = 24 cm
Q 19.
Volume of cuboid = l b h
Volume of cuboid = 8*6*3.5
Volume of cuboid = 168 m^3
T.S.A of cuboid = 2(l b+b h+h l)
T.S.A of cuboid = 2(8*6 + 6*3.5 + 3.5*8)
T.S.A of cuboid = 2(516 + 21 + 28)
T.S.A of cuboid = 2(575)
T.S.A of cuboid = 1150 m
L.S.A = 2(Length + Breadth) Height
L.S.A = 2(8 + 6) * 3.5 m
L.S.A = 28 * 3.5 m
L.S.A = 98 m