Need help for these 2 questions
- There were 330 green and blue marbles in a bag. 1/2 of the green marbles and 3/4 of the blue marbles were then taken out by Lisa. In the end, there were 90 green and blue marbles left in the bag. How many of the marbles in the bag were blue at first ?
- A tank measuring 80cm by 50cm by 60cm was empty at first. Water from a tap started to fill the tank at a rate of 1.5 litres per min. when the tank was 5/8 full, a crack appeared at the base of the container. Water began to leak from the crack at a rate of 500cm3 per minute. What was the total time taken for the whole tank to be completely filled with water ?
Thanks in advanced.