The ratio of the volume of water in Bottle P to the volume of water in Bottle Q is 3 : 4. Rajeev drank 40 mL of the water from Bottle P and the ratio then became 13 : 20. How much water was there in bottle P at first?
A 60 mL
B 80 mL
C 300 mL
D 400 mL
Find answer
Ans 1:
Class : Class 9
Solution=Let the quantity of water in bottleP = 3x and that of in bottle Q = 4x.According to question,â 20(3x â 40) = 4x à 13â 60x â 800 = 52x â 8x = 800 â x = 100So, quantity of water in bottle P = 3 à 100= 300 mLans.-c
Ans 2:
Class : Class 7
Let the quantity of water in bottleP = 3x and that of in bottle Q = 4x.According to question,⇒ 20(3x – 40) = 4x × 13⇒ 60x – 800 = 52x ⇒ 8x = 800 ⇒ x = 100So, quantity of water in bottle P = 3 × 100= 300 mL