Question

a chalk cost twise that of an duster . the chalk and the duster together cost Rs.39 find its cost (take y to be cost of a duster)​

Answer 1

Answer:

39÷2 =19.5 the chalk cost =19.5

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Answer 2

$\large\mathrm\blue{✎~Duster=13~,Chalk=26}$

Given:

Cost of chalk is twice the cost of duster

Solve:

Let's Take cost of duster be = y ( hint given)

then cost of chalk = 2y

sum of both = 39

Chalk + Duster = 39

2y + y = 39

3y = 39

( take 3 to RHS it will be division)

y = 39/3

y = 13

Cost of duster = 13

and chalk = 26