If the area of the region {(x,y):|x–5|≤y≤4x} is A, then 3A is equal to __________. [2025]
(368)
Area A=∫1254xdx–12×4×4–12×20×20
=[4x3/2×23]125–208
=83(125–1)–208
=3683 sq. units
⇒ 3A=368.