Grade 128 grade maths
If the cost of 20 pens is Rs. 180, calculate the cost of 15 pens?
Solution??
If the cost of 20 pens is Rs. 180, calculate the cost of 15 pens?
Solution??
1 Answer
Harshit Singh
Dear Student
20 pens cost Rs. 180.
Now, let the cost of 15 pens be Rs. x
In such a condition, the cost of pens changes directly with the total number of pens i.e. they are directly proportional.
20/180 = 15/x
x = Rs. 135
Thanks
20 pens cost Rs. 180.
Now, let the cost of 15 pens be Rs. x
In such a condition, the cost of pens changes directly with the total number of pens i.e. they are directly proportional.
20/180 = 15/x
x = Rs. 135
Thanks
Other Related Questions on 8 grade maths
What is the value of $ 5 $ million dollars in Indian rupees given that one dollar is equal to $ 75 $ Indian rupees.
What is the value of $ 5 $ million dollars in Indian rupees given that one dollar is equal to $ 75 $ Indian rupees.
8 grade maths
Last Activity: 11 Months ago
How many perfect cubes can you find from 1 to 100? How many from -100 to 100?
How many perfect cubes can you find from 1 to 100? How many from -100 to 100?
8 grade maths
Last Activity: 11 Months ago