3) A room of dimensions 5.8 m x 4.4 mx 4m has 2 square-shaped windows each of side 1 m and 2 doors each of height 2 m and breadth 1 m. Find the cost of whitewashing the room (including the ceiling) at the rate of 25 per sq. m.
Answers
Answered by
6
Answer:
475
Step-by-step explanation:
A room of dimensions 5.8 m x 4.4 mx 4m has 2 square-shaped windows each of side 1 m and 2 doors each of height 2 m and breadth 1 m. Find the cost of whitewashing the room (including the ceiling) at the rate of 25 per sq. m.
Answered by
2
Answer:
2528
Step-by-step explanation:
Area to be white-washed = (LSA of room - area of doors and windows) + area of ceiling
= [{2×(l+b)×h}-{2×(s²) + 2×(l×b)}] + (l×b)
= [{2×(5.8+4.4)×4} - {2×(1²)+2×(2×1)}] + (5.8×4.4)
= [{2×10.2×4} - {2×1+2×2}] + 25.52
= [{20.4×4} - {2+4}] + 25.52
= [81.6-6] + 25.52
= 75.6+25.52
=101.12 m²
Cost= 25 × area to be white-washed
= 25 × 101. 12
= Rs 2528
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