Per capita income of Bangladesh $1,466 (nominal; 2016). GDP by sector Agriculture: 15.33% Industry: 31.28% Services: 53.39% (FY 2015-16) [Last Updated]

অবিসংবাদিত = যে বিষয়ে মতভেদ নেই এমন

let, length=x breadth=y perimeter=2(x+y) here,x/2(x+y)=1/3 2x+2y=3x x=2y so,x/y=2:1

student got 125 marks and failed by 40 pass marks = 165 33%=165 so,100%=165 x100/33=500 mark

courtyard area=(25 x16) sq m brick area=(20/100 x10/100)=(.2 x.1)sq m so required brick=25 x16/.2x.1=20000

let, the number is x here, x-35=x-xX80/100 or,x=35 x 100/80 so ,four -fifth of the number is =35x100/80x4/5=140  

at 15% loss selling price 85 then cost price 100 selling price  1 then cost price 100/85 selling price 18700  then cost price 100x18700/85=22000 tk then,  at 15% gain cost price 100 then selling price 115 tk cost price  1    then   selling price 115/100 tk cost price 22000 the selling price=115x22000/100 tk=25300 tk

here, 3 man=6 boys so,1 men=6/3 boys so,6 men=6x6/3=12 boys so,6 men +2 boys=12+2=14boys 6 boys complete the work in 70 hours 1 boys complete the work in 70x6 hours 14 boys complete the work in 70x6/14 hours=30 hours to do double work needs=30x2=60 hhours total days=60/8=7.5 days  

total cost= (80,000+5000+1000) tk  = 86,000 tk at 25% profit, if buying price 100 tk then selling price 125 tk if buying price 1 tk then selling price 125/100 tk if buying price 86,000 tk then selling price 125 x86,000/100 tk=107500 tk

4 mat-weavers can weave 4 mats in 4 day so,8 mat-weavers can weave 8 mats in 8 day

7 spider make 7 webs in 7 days 7 spider makes 1 web in 7/7 days 1 spider makes 1 web in 7x7/7days=7 days

36 men can do a work in 18 days 1 men can do a work in 18x36 days 27 men can do a work in 18x36/27 days=24 days

let, breadth=x length=x+x X 60/100=160x/100 now, 160x/100-x=24 or,60x=24x100 so,x=40 so,length=160x40/100=64 Area= 40x64=2560 sq cm

x% of y=z y X x/100=z or,xy=100z or,x=100/y X z so.1002/y of z=x so,1=100%  

after covering 20% loss he gained 5% so, he actually gained total=(20+5)%=25% here, 25%=100 tk so 100 %= 100x100/25=400 tk  

data insufficient

in first five hours he journeyed=21x5=105 km in second five hours he journeyed=24X5=120 km total=(105+120)=225 km

principle+4  years interest = 854 tk principle+3 years interest=    815 tk so, interest of 1 year= 39 tk so, 3 years interest=39 x3=117 tk so,principle=(815-117) tk=698 tk  

Only 12= 1

92 = 81 but it is greater than 70.

So 1/70 * 100% = 1.42% 

Suppose, Breadth is x cm; length will be 2x cm

so area = 2x2

If its length is decreased by 5 cm it will be 2x-5 and breadth is increased by 5 cm it will be x+5

New area will be (2x-5)(x+5) =2x2+ 10x - 5x - 25= 2x2+ 5x -25

So,

2x2+ 5x  - 2x2 = 75

5x = 75

x = 13

Length is 26cm

সব গুলোই Leap year.