Delhi Police Constable Exam Model Paper 8

GIVEN:
There is a rectangular park with lengths and breadths as 90 m and 50 m respectively.
FORMULA USED:
Area of the cross road
CALCULATION:Using the formula:
Area of the road = $90\times 5+50\times 5\mathit{–}5\times 5$
= $450+250\mathit{–}25=700\mathit{–}25=$
$675{\mathit{m}}^2$

Hence,
Cost of building the road = $675\times 5=\mathit{R}\mathit{s}.3375$