A worker may claim Rs. 15 for each km when 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 km ,how many kms did he travel by taxi?
A)10
B)20
C)30
D)40
Correct Answer:
A
Solution :
If 'x' km is the distance by taxi, then \[15x+\left( 80-x \right)\times 5=500\]which gives \[x=10.\]