Question

A rectangular lawn 60 meters by 40 meters has two roads each 5 meters wide running in the middle of it one parallel to length and the other parallel to breadth. The cost of gravelling the roads at 60 paise per sq meter is

• A. Rs $300$
• B. Rs $280$
• C. Rs $285$
• D. Rs $250$

Answer 1

Answer: (C)

Given,
A rectangular lawn $60$ meters by $40$ meters has two roads each $5$ meters wide running in the middle of it one parallel to length and the other parallel to breadth
Area of the road$=40\times 5+60\times 5-5\times 5$
$=200+300-25$
$=475sqm$
Given,
Cost of graveling the roads $=60$ paise per sq meter.
$\therefore 475\times 60$paise
$=28500$ paise
$=Rs.285$