Question

the rectangular peice of plastic sheet measures 1m by 70 cm .findits cost at the rate of ₹80 per square meter.

Answer 1

length = 1m = 100cm  
breadth = 70cm
area = l * b
= 100 * 70
= 7000 sq. cm
cost at the per sq. m = 80 rupees 
total cost = 80 * 7000
               =560000 rupees

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