A worker may claim Rs 15 for each km which he travels by taxi and Rs 5 for each km when he drives his own car. If in one week he claimed Rs 500 for travelling 80 kms, how many kms did he travel by taxi?
A
10
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B
20
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C
30
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D
40
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Solution
The correct option is B 10 The problem can be solved by considering the options one by one. Option (1) implies 10 km by taxi and 70 km by own car. Total charges =Rs10×15+Rs5×70=Rs500=Rs10×15+Rs5×70=Rs500 which is true.