Question

20. The cost of 15 dozen pencils is Rs. 180. Find the cost of 36 pencils.

Answer 1

36. Cost of one pencil =x

15 Dozen pencils = 15*12=180

cost of one pencil=cost of 15 dozen pencisl/180=1

36*1=36

Answer 2

$\huge\sf\underline\red{Solution}$

Given that ,

Cost of 15 dozen pencils is 180rs

$\large\sf{\boxed{\underline{1 dozen=12 items}}}$

Cost of 15×12 pencils =180rs

Cost of 180 pencils =180rs

Cost of 1 pencil = 1rs

Cost of 36 pencils =36×1=36Rs

$\huge\sf\underline\red{Conclusion}$

Cost of 36 pencils is 36Rs