Ihe length of a blackboard is 3 m and its breadth is 2 m. Find the cost of painting 7 blackboards at the rate of .50 per Square metre. c
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2
area = l × b = 3m × 2m = 6m²
cost of painting per m² = ₹50.
cost of painting 6 m² = ??
= 6 × 50 = 300₹
Answered by
3
Answer:
Width of rectangular board = 1.5 m
The length of a rectangular black board is three times its width
Length of rectangular board = 3(1.5)=4.5 m
Area of rectangular board = lxb=1.5x4.5
Cost of 1 sq.m. = Rs.5.50
Cost of 6.75 sq.m. =6.75x5.50=RS.37.125
Hence the cost of painting the blackboard at the rate of rupees 5.50 per sq. m. is Rs.37.125
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