"If 80 lams can be lighted 5 hours per day for 10 days for Rs. 21.2 then the
Channel: Doubtnut
Date: 2020-04-12

"If 80 lams
 can be lighted 5 hours per day for 10 days for Rs. 21.2 then the number of
 lams which can be lighted 4 hours daily for 30 days, for Rs. 76.50 is
`100`
b. `120`
c. `150`
d. `160`".