Question
PSLE
The figure shows an empty tank placed below two taps S and T. It takes 6 min to fill the tank with Tap S alone and 9 min Tap T alone.
  1. With only Tap S 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 19 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 S and T. It takes 6 min to fill the tank with Tap S alone and 9 min Tap T alone.
  1. With only Tap S 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 19 of the tank? Give your answer in seconds.