A boy walks a distance of 30 m in 1 minute and another 30 m in 1.5 minutes. Find his
average speed in m/sec.Draw a diagram to represent the type of motion exhibited by the
boy.
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5. Find the amount and compound interest on 80,000 at 10% for 12 years compounded half yearly
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Solution:
Total distance travelled in going and coming back
D = 30m + 30m = 60 m
Total time taken in going and coming back
t= 1 min + 1.5 min =2.5 min
= 2.5 60 s
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