the length,breadth and the height of a room are 5m, 4m and 3m respectively.find the cost of white washing the walls of the room and the ceiling at the rate of rs 10 per m
Answers
Answer:
Step-by-step explanation:
l= 5m, b= 4m, h= 3m
Area to be whitewashed = Area of 4 walls + area of ceiling
= CSA of cuboid + l×b
= 2(lb +bh +hl) + l×b
= 2( 5×4 + 4×3 + 5×3) + 5 ×4
= 2(20+12+15) +20 = 94 +20 = 114m²
Cost for whitewashing 118m² = 118 × 10 = ₹1180
Answer:
740
Step-by-step explanation:
Area of 4 walls of room= 2h(l+b
= 2×3(5+4)
= 54 sq.m
Area of ceiling = l×b
= 5×4= 20 sq.m
Area of whitewashing = 54+20= 74 sq.m
Cost of whitewashing =10×74
= Rs. 740