Question
PSLE
The figure shows an empty tank placed below two taps Y and Z. It takes 8 min to fill the tank with Tap Y alone and 12 min Tap Z alone.
  1. With only Tap Y turned on, what fraction of the tank will be filled in 1 minute?
  2. Starting with an empty tank, how long does it take for both taps together to fill 16 of the tank? Give your answer in seconds.
3 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

PSLE
The figure shows an empty tank placed below two taps Y and Z. It takes 8 min to fill the tank with Tap Y alone and 12 min Tap Z alone.
  1. With only Tap Y turned on, what fraction of the tank will be filled in 1 minute?
  2. Starting with an empty tank, how long does it take for both taps together to fill 16 of the tank? Give your answer in seconds.