A room is 4m long and 3m50cm wide.How many square metres of carpet is needed to cover the floor?
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Answer:
length = 4m
1m =100cm
4m = 4× 100
400cm
breadth = 3m50cm
1m = 100cm
3m = 3× 100 cm
300 + 50 cm
350 cm
area of carpet = l × b
400 × 350 cm
14000cm
1m = 100cm
14000 ÷ 100
140 square metres carpet is required
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