7 The area of a rectangular field is 0.5 ha. If one side is 12.5 m, find the other side in metres.
8. A rectangular piece of plastic sheet measures 1 m by 70 cm. Find its cost at the rate of 80 per square
metre.
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Step-by-step explanation:
7) Area of rectangular field=0.5ha
1ha=10000m^2
Now area=0.5×10000=5000m^2
Area of rectangle=l×b
5000=l×12.5m
l=5000/12.5
l=400m
other side=400m
8)Area of rectangular piece = 1×(70÷100)
=0.7 sq.m
total cost = rate ×area
= 80×0.7
=56
Hence total cost is Rs 56
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