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WorksheetsAmv Class 8 , math 2078
Total questions: 110
Worksheet time: 1hrs 2mins
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Find out the total amount when Rs 5500 is deposited in a Bank at rate of interest 10% p.a in one year also calculate the amount for the next year too.
Solution:
principal(P)=Rs 5500
time(T)=1 year
rate of interest (R)=10%
First amount (A)=?
∵A =P(100100+TR) =Rs 5500(100100+1 X 10) =Rs 5500(100100+10)
=Rs 5500(100110) =Rs 5500 X 100110=Rs 6050 again ,
in bank Rs 6050 is deposited at the same rate of interest for one year.
principal (P)=Rs 6050
time(T)= 1 year
rate of interest (R)=10%
second amount(A)=?
∵A=P(100100+TR) =Rs 6050(100100+ 1 X 10) =Rs 6050X 1.1
=Rs 6655
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Change 12345 into binary number system.
click if below process is correct.
Solution: first changing quinary number 12345 into decimal number then after binary numbers
12345 =1x53 +2x52 +3x51 +4x5o =1x125+2x25+3x5+4x1=125+50+15+4= 194(10)
12345 =1x53 +2x52 +3x51 +4x5o =1x125+2x25+3x5+4x1=125+50+15+4= 194(5)
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The trapezium shaped land shown in the figure ,belongs to Rita .She dig a circular well with diameter 1.4m for irrigation purpose of her land.)
i) Write the formula to find the area of lead of well.
ii) find the area of well dig by Rita.
iii) find the area of land except well.
click in wrong answer for above question.
i) Soln :the formula to find the area of lead of well (A )= π r2
or,
the formula to find the area of lead of well(A )= 4πd2
ii) Soln : diameter of lead(D)=1.4 m
the area of well dig by Rita (A )= 4πd2 = 7×422(1.4m)2=7×422 ×1.4×1.4m2 =1.54 m2
iii) Soln : height of trapezium(h)=20 m
length of AD (l1 )= 35 m
iii) Soln :length of AD (l2)= 35 m
area of trapezium(A)=?
area of trapezium(A)= 2h(l1+l2)
= 220m(35m+40m)
=750m2
the area of land except well=area of trapezium-area of lead of well
=750m2 -1.54 m2
= 748.46 m2
the area of land except well=area of trapezium+area of lead of well
=750m2 +1.54 m2
= 751.54m2
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