Find the cost of painting a tank of dimension 3 m x 2 m x 1.5 m at * 20 per square metre.
Find the total surface area of a cuboid whose length, breadth, and height are 9 cm, 7 cm, and 4 cm
respectively.
Find the surface area of a cubical box whose one side is 80 cm.
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Q1.
TSA= 2(lb+bh+lh)
l = 3m , b= 2m , h = 1.5m
so,
=2(2×3+2×1.5+3×1.5)
=2×13.5
= 27m
Cost :- area×cost
= 27×25 = rs. 540
Q2.
TSA= 2(lb+bh+lh)
L =9cm
B=7cm
H=4cm
so,
=2(9×7+7×4+9×4)
=2(56+28+32)
=2(116)
=232 cm²
Q3.
surface area of cube = 6a²
a=80 cm
=6(80)²
=6(6400)
=38400 cm²
HOPE IT HELPS
MARK BRAINLIEST PLS