Question

A glass is 1/4 full .
Then 70cm3 of orange juice is poured in.
The glass is now 3/5 full.
What is the total volume of the glass?

Answer 1

Answer:

130cm^3

Step-by-step explanation:

glass full at the starting = 1/4

glass after pouring = 3/5

LCM of 5,4

LCM = 20

1/4 = 5/20

3/5 = 12/20

70cm^3 = 12/20 - 5/20

70cm^3 = 7/20

70cm^3 = 7y/20y

therefore, the value of 7y is 70( y = 10 )

20y - 7y = 13y

13y = 13 × 10

= 130 cm^3

Answer 2

let total volume of glass be V

after filling in the juice , vol becomes = 3V/5

initial = V/4

difference in volume ,

3V/5 - V/4 =70cm^3

0.6V - 0.25V = 70

0.35V = 70

V = 70/0.35

V = 200 cm^3