If the langth of a rectangle is increased by 20% and width is decreased by 20% what is the change in area of rectangle ?
unchanged
decreased by 4%
increases by 4%
increases by 5%
The dimensions of a box are 2,3 and 4 meters . the cost of painting the outer sides of the box at the rate of tk. 3 per square meter is ___
tk. 156
tk. 120
tk. 136
tk. 160