Comparing Quantities Class 7 answer the questions from 7 to 14
Answers
Answer:
Step-by-step explanation:
7) Given petrol present price = 52.
Old price = 1
Price Increased = 51
Increased % = 51 *
= 5100%.
8) 9 is 25% of 36.
9) 75% of 20 is 15
10) Selling price = Rs 250
Profit = 5 %
Profit (%) = (SP-CP)/CP x 100
5 = (250-CP)/CP x 100
105CP = 25000
CP = Rs 238
11)Simple interest=P×R×T/100
p=6050
r=6.5% p.a
t=3 years
Simple interest=6050×6.5×3/100
interest=1179.75 rupees
total amount = interest+ principal amount
= 6050+1179.75
= Rs 7229.75
12)Simple interest=P×R×T/100
p=7000
r=3.5% p.a
t=2 years
Simple interest=7000×3.5×2/100
interest=490 rupees
total amount = interest+ principal amount
= 7000+490
= Rs 7490
13)The cost of a book =Rs.275
Loss percent =15%
Loss=Loss % of C.P =15% of Rs. 275
= 15×275/100
=rs 41.25
Therefore, S.P = C.P - Loss
=275−41.25=Rs.233.75
Hence, Amina sells a book for Rs. 233.75
14) Simple Interest =Rs.45 Rate(R)=9% time(T)=1 year
Simple interest=P×R×T/100
45=P×9×1/100
4500=P*9
500=P
Hence, she borrowed Rs. 500
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