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The student lockers at school are numbered consecutively beginning with locker number 1. The plastic digits used to number the lockers cost Rs 1 a piece. Thus, it costs Rs 1 to label locker number 9 and Rs 2 to label locker 10. If it costs a total of Rs 7293 to label all the lockers, how many lockers are there at the school? [DCRU]
A. 2573
B. 2100
C. 1200
D. 2431

Read Solution (Total 2)

1 to 9(1digit)
cost rs 9
10-99(2digit)
cost
rs 180
100-999(3 digit)
cost rs270
let 4 digit lockers be x
so
7293=9+180+2700+4x
x=1101
total lockers=1101+9+90+900=2100
11 years agoHelpfull: Yes(30) No(1)

2100 mqy be
11 years agoHelpfull: Yes(2) No(0)

TCS Other Question

Write numbers from 100 to 365 in a sequence like 100101102103104105……….364365 How many times the digit 9 occurs in the sequence?
A. 93 [DCRU]
B. 46
C. 45
D. 91 Traffic on NH4, the Chennai Banglore highway moves at a constant speed of 90 kms per hour in both directions. A Banglore bound driver passes 20 Chennai bound vehicles in a 2 minute interval. Assume that the vehicles in the Chennai bound lane are equally spaced. Which of the following answers is closest to the number of Chennai bound vehicles in a 90 kms stretch of the highway? [DCRU]
A. 225
B. 300
C. 600
D. 150