a floor of a rectangular hall has a perimeter 236 M its height is 4.5 M find the cost of painting its 4 wall doors and windows be ignored at 8.40 per square metre
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Hi there !
here's your answer
Perimeter = 2(l + b)
lateral surface area = 2(l+b)h or 2h(l+b)
it can be seen that perimeter is included in the lateral surface area in this case.
so,
area of walls = 2(l+b)h
= 236m × 4.5m
= 1062m²
Cost per m² = Rs 8.40
Cost for 1062m² = 1062 × 8.40
= Rs 8920.8
here's your answer
Perimeter = 2(l + b)
lateral surface area = 2(l+b)h or 2h(l+b)
it can be seen that perimeter is included in the lateral surface area in this case.
so,
area of walls = 2(l+b)h
= 236m × 4.5m
= 1062m²
Cost per m² = Rs 8.40
Cost for 1062m² = 1062 × 8.40
= Rs 8920.8
Anonymous:
is it ok??
yes it ok
thanks
:-) hope helped (-:
yes
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