Question

d. At what time will ` 4500 amount to ` 5715 at 9 % per annum simple interest?

e. The ratio of boys and girls in a school is 8 : 3. If the total number of girls be

990, find the number of boys in the school.
Answer both fast​

Answer 1

Step-by-step explanation:

a.so we firstly find interest=5715-4500=₹1215

now we use formula of T=(SI * 100)/(P * R)

so 1215 *100 /4500*6

121500/2700

4.5 years

b. so we put them in proportion=8:3::x:990

now we can find x = (990*8)/3

we cut 3 and 990 so 330*8

gives 2640 boys

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Answer 2

Step-by-step explanation:

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