A clock gain 2 minutes in 6 days. how many days does it take to gain 5 minutes? If a carpet of area 12 m^2 costs 96 euros, what is the cost of a carpet of area 15 m^2.

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justaguide's profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted on

A clock gain 2 minutes in 6 days.

Let the time taken to gain 5 minutes be T. Using ratio of the number of days taken to gain the time is the same

=> 2:6 = 5:T

=> 2*T = 30

=> T = 30/2

=> T = 15 days.

12 m^2 of the carpet costs 96 euros. Let the cost of 15 m^2 of the carpet be M. As the area and the cost are in the same ratio

=> 12 : 96 = 15 : M

=> M = 96*15/12

=> M = 120

The clock gains 5 minutes in 15 days and the cost of 15 m^2 of carpet is 120 euros.

najm1947's profile pic

najm1947 | Elementary School Teacher | (Level 1) Valedictorian

Posted on

Both the questions can be solved using unitary method

Q.1

Number of days to gain 2 minutes = 6

Number of days to gain 1 minute = 6/2 = 3

Number of days to gain 5 minutes = 3*5 15

So the clock will take 15 days to gain 5 minutes

Q.2

Cost of 12 M^2 of carpet = 96 Euros

Cost of 1 M^2 of carpet = 96/12 = 8 Euros

Cost of 15 M^2 of carpet = 8*15 = 120 Euros

 

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