Question

19. The cost of constructing a road is Rs 5,000 per 100 m². Find the cost of constructing a road 5 m broad surrounding a garden 100 m long and 10 m broad.
20. A rectangular wall of area 30 m' has a length of 10 m. It is to be painted blue from the base to a height of 2.5 m, leaving 1 m on each side. The rest is to be painted white. If the cost of white and blue paints required to paint per square metre are Rs 460 and Rs 475 respectively, and the labour cost per square metre is Rs 25 for both the colours then find the total cost of painting the wall.
(Answers-(19). Rs.60,000 (20). Rs.14,850

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Thank you.( in advance)​

Answer 1

Length of the road =100-5-5 =90

Breadth of the road=5

Area of the inner part=90*5=450

Area of the road-1000-450-550

Cost of construction=(5000*550)/100=27500

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