question_answer

A rectangular lawn \[\text{80 m  }\!\!\times\!\!\text{  60 m}\] has two roads each 10 m wide running in the middle of it, one parallel to the length and the other parallel to the breadth. Find the cost of gravelling the roads at ` 30 per square metre.

A)  ` 35000

B)  ` 42000

C)  ` 40000

D)  ` 39000