a 9. The boys and girls in a school are in the ratio of 2:3. If the total strength of school is 15so, find out the numbe of boys and girls in the school. The ratio of gold and cadmium in an ornament is 93: 7. If the weight of the ornament is 300g, find out the weight of cadmiam and gold in the ornament.
Answers
Answered by
1
Answer:
1. 9 2.
Step-by-step explanation:
1. let the ratio be x
no of boys = 2x
no of girls= 3x
2x+3x = 15
5x= 15
x= 15/5
x=3
2x=2*3=6
3x=3*3=9
2. let the ratio be x
weight of gold in ornament = 93x
weight of cadmium in ornament= 7x
7x+93x=300g
100x= 300g
x=300/100
x=3g
gold= 93 x = 93*3 = 279g
cadmium= 7x = 7*3 = 21g
if you understood please mark my answer as brainliest
Similar questions