kinkin79
31.01.2021 •
Mathematics
When a beaker of sand is dried in a hot oven its mass reduces from 1.2kg to 870g. Find the percentage reduction in its mass.
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Ответ:
Step-by-step explanation:
the mass 1.2kg=1200 g
1200/870=120/87= 40/29
Ответ:
The equation for this would be expressed as d=k/t. Using this equation we could plug in the find the value of k which would be expressed as 30=k/2. This means k=60. The final equation would be d=60/t. Plugging in the 50 miles would get us the time to travel this distance.
The time would be 1.2 hours or 1 hour and 12 minutes.