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Compound Interest, Speed, Distance & Time — Chapter Test

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Q1
Speed = distance ÷ ___ ?
Speed = distance ÷ time.
Q2
Compound interest is charged on the principal and on earlier ___ ?
CI is charged on the principal and on earlier interest.
Q3
Average speed = total distance ÷ total ___ ?
Average speed = total distance ÷ total time.
Q4
Distance = speed × ___ ?
Distance = speed × time.
Q5
What is the compound interest on ₹1000 at 10% for 2 years?
Year 1: ₹100, year 2: ₹110, total CI = ₹210.
Q6
What is the amount on ₹1000 at 10% compound interest for 2 years?
Amount = ₹1210 (CI ₹210).
Q7
A car covers 180 km in 3 hours. What is its speed?
180 ÷ 3 = 60 km/hr.
Q8
A car travels at 70 km/hr for 2 hours. How far does it go?
70 × 2 = 140 km.
Q9
How long does a 240 km journey take at 60 km/hr?
240 ÷ 60 = 4 hours.
Q10
What is the SI on ₹5000 at 10% for 2 years?
SI = (5000 × 10 × 2) ÷ 100 = ₹1000.
Q11
A train covers 300 km in 5 hours. What is its speed?
300 ÷ 5 = 60 km/hr.
Q12
A cyclist covers 36 km in 3 hours. What is the speed?
36 ÷ 3 = 12 km/hr.
Q13
What is the amount on ₹2000 at 10% compound interest for 2 years?
Year 1: 2200, year 2: 2420.
Q14
A man drives 60 km at 30 km/hr, then 60 km at 60 km/hr. What is his average speed?
Times are 2 h and 1 h; total 120 km in 3 h, so 120 ÷ 3 = 40 km/hr.
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