Question

A tank 12m long, 8m wide and 5m deep is to be made. it is open at the top. determine the cost of iron sheet at the cost of rs. 250 per meter. if the sheet is 4m wide

Answer 1

first we will find the area of whole tank including it's top,
then, surface area of tank will be 2(lb+bh+hl)
now,
=2(96+40+60)
=2*196
=392
now we will subtract the top of the tank which the question had asked
so, the area of the top of the tank is 2(l+b)
=2*96
=192cm^2
again, the cost of iron sheet for making the tank = 192/4
                                                                             =  48cm^2*4
                                                                             =Rs 192

Answer 2

Answer:

this answer is wrong answer is 18500