A classroom is 7m long , 6 m board and 3.5m high . Doors and window occuopy are of 17m squ unit . What is the cost of white washing the wall at the rate of rs 1.50 per m cube
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cost =1.50× [2(lb +bh+hl)]- lb+17
= 1.50 × [2(7×6+6×3.5+3.5×7)-7×6+17
= 1.50 × [2(87.5)-59]
= 1.50 ×[ 175-59]
= 1.50 × 96
= 144 Rs/-
= 1.50 × [2(7×6+6×3.5+3.5×7)-7×6+17
= 1.50 × [2(87.5)-59]
= 1.50 ×[ 175-59]
= 1.50 × 96
= 144 Rs/-
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