Question
The perimeter of a square field is 10 cm more than the
perimeter of a rectangle. The length of the rectangle is 60 cm which is 80% of its width. If a street of width 10 cm surrounds from outside the square, then find the total cost of constructing the street at the rate of Rs. 20 per sq. cm.Solution
Let the width of the rectangle = x cm Then, 80% of x = 60 x = 60 × 100/80 = 75 cm Perimeter of the rectangle = 2 (length + width) = 2 × (60 + 75) = 270 cm Perimeter of the square = (270 + 10) = 280 cm The sides of the square = 280/4 = 70 cm The area of the square field without street = (70)2 sq. cm = 4900 sq. cm  The area of the square field with street = (70 + 20)2 sq. cm = 8100 sq. cm The area of the street = 8100 – 4900 = 3200 sq. cm The total cost of constructing the street = 3200 × 20 = Rs. 64000
Select the correctly punctuated sentence from the options below.
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His father had already bought the train tickets.
The General presented us a detailed battle plan.
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She writes a letter every day.
Select the correct active form of the given sentence.
This beautiful story was written by Maya.
The cake was eaten by the children.
Select the option that expresses the given sentence in active voice.
Not a word was spoken by the criminal in self-defence.Â
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They were refused entry in Delhi by the police.
Select the passive form of the given sentence. The manager keeps the work pending.
At the drop of a hat
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