Question

4. Two crossroads, each of width 4 m, run at right angles through the centre of a park of length 65 m and
breadth 45 m and parallel to its sides. Find the area of the roads. Also find the cost of constructing the
roads at the rate of 2500 per 10 sq m.​

Answer 1

Answer:

width =5 m

length of first parallel road 70 m

area of first road 70×5=350 sq.m

length of second road 45 m

area of second road =45×5=225 sq.m

area of the common part of cross road with 5 m width that lies at the

center of the park 5×5 = 225 sq.m

area of roads = area of first road +area of second cross road−common area

=(350+225)−25

=575−25

=550sqm

cost of the construction per sq.m =Rs.105

total cost =550×105=Rs 57750