A hall 20 m long and 15 m broad is surrounded by a verandah of uniform width 2.5 m. What is the cost of flooring the verandah at Rs 3.50 per square metre?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Rs 700
The verandah runs all round the hall, so the outer rectangle is 2.5 m longer on each side, that is 5 m more in length and in breadth. The verandah's area is the outer area minus the hall's area.
Outer rectangle: \((20+5)\times(15+5)=25\times20=500\) m2
Hall: \(20\times15=300\) m2
Verandah: \(500-300=200\) m2
Cost \(=200\times3.50=\) Rs 700
