Question

James bought 5 each of two kinds of CFL bulbs for 1000 rupees.The price of the cheaper lamp is 85 rupees a piece.What is the price of one of the costlier kind?

Answer 1

cost of 1 cheaper lamp=85,

then

cost of 5 cheaper lamps=85×5=425,

therefore

left money=1000-425=575,


now the remaining 575 rs. will be the cost of 5 costlier lamps,

then

cost of 1 costlier lamp=575/5,

=115 rs.

Answer 2

The price of one of the costlier kind is  Rs.115.

Step-by-step explanation:

Given:

James bought  5 each of two kinds of CFL bulbs for 1000 rupees.

The price of the cheaper lamp is 85 rupees a piece.

To Find:

The price of one of the costlier kind.

Solution:

As given, The price of the cheaper lamp is 85 rupees a piece.

Cost of 1 piece of cheap CFL = Rs.85

Cost of 5 pieces of cheap CFL $=5\times 85= Rs.425$

Let the price of 1 piece of costlier  CFL is p.

Cost of 5 pieces of costlier  CFL = 5p.

As given, James bought  5 each of two kinds of CFL bulbs for 1000 rupees.

$425+5p=1000$

$5p=1000-425$

$5p=575$

$p=\frac{575}{5}$

  $= Rs.115$

Thus,the price of one of the costlier kind is  Rs.115.

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