1. Frank and Ernest start jogging on a 110m circular track. They begin at the same time and from the same point but jog in opposite directions, one at per second and the other at per second. How many times will they meet during the first 15 minutes of jogging?
2. Two candles of the same height are lit at the same time.. The first is consumed in four hours, the second in three hours. Assuming that each candle burns at a constant rate, how many hours after being lit was the first candle twice the height of the second?
3. If a:b = 3:4 and a: (b+c)= 2:5, find the value of a:c.
5. The volume of two boxes are in the ratio 3:8. If the volume of the larger box is more than the volume of the smaller box, find the volume of each box.
Express each of the following with denominator 1:
Simplify / Evaluate
Thank you guys.