Length breadth and height of rumour 5 M 4 m and 3 M find the cost of whitewashing the walls of room and the ceiling at the rate of rupees 7.50 per metre square
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Length=l=5
b=4
h=3
Area for whitewashing = CSA of cuboid (room) + Area of ceiling.
= 2 (l+b)h+l×b
=2 ( 5+4)3+(5×4)
=2 ×9×3+20
= 54+20
=74.
Rate= 7.50/square.m
Cost = Rate × Area
Cost = 7.5×74
Cost = Rs.555
b=4
h=3
Area for whitewashing = CSA of cuboid (room) + Area of ceiling.
= 2 (l+b)h+l×b
=2 ( 5+4)3+(5×4)
=2 ×9×3+20
= 54+20
=74.
Rate= 7.50/square.m
Cost = Rate × Area
Cost = 7.5×74
Cost = Rs.555
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1
area
wall l×b×h.5×4×3=60m2 .white washingof wall=60×7.50=rs.4500
wall l×b×h.5×4×3=60m2 .white washingof wall=60×7.50=rs.4500
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