The length of a rectangular weooden board is thrice its width. if the width of the board is 120cm, find the cost of farming it at the rate of $5 for 20cm
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Answer:
the correct answer is $ 10800
Step-by-step explanation:
- given that the ,
- width of the rectangle is 120cm and the length of the rectangle is 3 times the width
- so length of the rectangle = 3×120=360cm
- area of the rectangle = l×b=120×360sq.cm=43200sq.cm
- cost of farming it = $5 per 20cm
- total cost = 43200÷20×5=$10800
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