please solve this please
Answers
Answer:
Step-by-step explanation:
Q.1)a.
7 : x = 17.5 : 22.5
7/x = 17.5/22.5
22.5 × 7 = 17.5x
157.5 = 17.5x
x = 157.5/17.5
x = 9
b.
8 : 13 = x percent
8/13 = x/100
13x = 8 × 100
x = 800/13
x = 61.53
Q.2) Shagufta purchased wheat at Rs= 18 per kg
Kg of wheat purchased = 25 kg
Total Rs she had to pay = 18 × 25
= 450 Rs
Another, she bought wheat at = Rs 20
Total wheat bought = 35 kg
total money spent = 20 × 35
= 700]
total wheat purchased = 35 + 25 = 60 kg
Total money spent = 450 + 700 = 1250
She sell the mixture of both wheat at the cost = Rs 20
The money she got after selling 60 kg of wheat = 20 × 60 = 1200
Profit gain = 1250 - 1200 = 50 rs
profit (gain) percent = profit made/ cp × 100
= 50/1200 × 100
= 50/12
= 4.166 percent
Q.3)
market price of gift set = Rs 4995
Sold at = discount of 10 percent
so the new price at which it is sold= 4995/ 10
= 499.5
so the price will be = 4995 - 499.5 = Rs 4495.5
Q.4)a.
P.A= 2000
Rate of interest = 8 percent
time= 1 yr
C.I compounded half yearly=
P × {1+r/100} to the power time
2000×{1+8/100} power 2
2000 × { 108/100} power 2
2000 × 108/100 × 108/100
(2 × 108 ×108)/ 10
23328/10
2332.8
Therefore compound interest = 2332.8-2000=332.8
b)
P.A= 7500
Rate= 4 percent
Time= 2year
C.I compounded annually =
P × {1+r/100} to the power time
7500 × {1+ 4/100} power 2
7500× 104/100 × 104/100
{75 × 104 × 104}/100
811200/100
8112
Therefore, C.I = 8112 - 7500 = 612