18. A black board of sides 5 m 50 cm and 4 m 40 cm is to be painted. Find the cost at the rate of 10 per square meter
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Answer:
5m*100=500cm
500+50=550cm
4m*100=400cm
400+40=440cm
Perimeter of Rectangular=L*B
l=550cm
b=440cm
550*440
2,42,000cm 2,42,000/1000=242m
cost of 1 m=10ruppes
cost of 242m=10*242=2420
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