Question

A hall, 20 m long and 15 m broad, is surrounded by a verandah of uniform width of 2.5 m. The cost of flooring the verandah at Rs. 3.50 per square metre is​

Answer 1

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Given,

Length of Hall = 20m

Breadth of Hall = 15m

The hall was surrounded by a verandah of width 2.5m

Since, The hall is Surrounded by verandah 

So, Additional increase in length will be

→ $2 \times 2.5 = 5m$

Now,

Total Area = Area of Hall + Verandah

$\boxed {\bf{Area\;of\; Rectangle = l×b}}$

→ $(20+5)(15+5)$

→ $25\times20$

→ $\boxed {500 m²}$

Area of Hall = l×b

→ $20\times15$

→ $\boxed {300m²}$

Area of Verandah = Area of Total Room - Area of Hall

→ $500m²-300m²$

→ $200m²$

Area of Verandah = $\fbox\red {200m²}$

Rate of 1 sq.mt for flooring = Rs. 3.50

Rate of 200 m² = 200 × 3.50

→ $\Large\purple {Rs.700}$

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