,, a bank is 30 M long 9 M wide and 4 metre deep what is the cost of plastering its walls and bottom at 25 paise per square metre
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Surface are of the inner four walls =2(Lxh)+2(bxh)
=2h(L+B) =2x4x(30+9) =312 m²
surface area of the base of the bank =LxB
=30x9 =70 m²
total surface area to be plastered =312+270 =582 m²
total cost to be paid =582x25 =14,550paise =Rs 145.50
=2h(L+B) =2x4x(30+9) =312 m²
surface area of the base of the bank =LxB
=30x9 =70 m²
total surface area to be plastered =312+270 =582 m²
total cost to be paid =582x25 =14,550paise =Rs 145.50
Prashant24IITBHU:
Shukriya
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area of walls=2*(30*4 + 9*4)=312square meter
so cost is 312*25=7800paise=78rupees
so cost is 312*25=7800paise=78rupees
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