Question

if the coast of 10 note books is rs 225 find the cost of 25 notebook and 45 such note books​

Answer 1

Cost of 10 n.b. = 225

Cost of 1 n.b. = 225/10 =45/2. = rs.22.50

Cost of 25 n.b. = 45/2*25 = 1125/2= rs.562.50

Cost of 45 n.b. = 45*45/2

=rs 2025/2 = rs. 1012.5

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