Advertisements
Advertisements
प्रश्न
An alloy of copper and zinc contains 45% copper and the rest is zinc. Find the weight of zinc in 20 kg of the alloy.
Advertisements
उत्तर
Total weight of alloy = 20 kg
Weight copper = 20 × 45% = `20xx45/100` = 9 kg
Weight of zinc = (total weight of alloy – weight of copper)
= 20 – 9
= 11 kg
APPEARS IN
संबंधित प्रश्न
Write the following as percent:
0.005
Asha got 86.875% marks in the annual examination. If she got 695 marks, find the total number of marks of the examination.
The population of a town increases by 10% annually. If the present population is 22000, find its population a year ago.
Express the following as percent: 0.125
Express:
700 gm as a percentage of 2.8 kg.
Evaluate:
30% of 200 + 20% of 450 – 25% of 600
Evaluate:
70% of 70 + 90% of 90 – 120% of 120.
A number is increased by 25% and then decreased by 20%. Find the percentage change in that number
Lalitha took a math test and got 35 correct and 10 incorrect answers. What was the percentage of correct answers?
What per cent of 1 km is 1000 metres?
