A rectangular swimming pool is 15 m long and 7 m wide. A path 1 m wide is constructed outside the swimming pool. Find the area of the path and the cost of constructing it at the rate of Rs. 50 per m.
a) Area = 158 sq. m, Cost = Rs. 7,900
b) Area = 170 sq. m, Cost = Rs. 8,500
c) Area = 180 sq. m, Cost = Rs. 9,000
d) Area = 190 sq. m, Cost = Rs. 9,500