A shopkeeper brought TV set at 10 thousand rupees in one year after he sold at 8000 rupees find he made profit or loss and also find in percentage
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Given s =t+ 220/30 ••••••• (1)
and s= t + 325/39 ••••••• (2)
on solving (1) and (2), we get
39(t + 220) = 30(t + 325)
39t + 8580 = 30t + 9750
9t = 1170
t = 130 metres
Substitute in (1), we get
Speed = 130 + 220/30
= 350/30 =
= 11.66 m/sec
On converting it to km/hr, we get
S = 3600 * 11.66/1000
= 41.9
= ~42
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