A picnic is being planned in a school for class 7th. Girls are 60% of the total number of students and are 18 in number.
The picnic site is 55 kilometre from the school and the transport company is charging the rate Rupees 12 per kilometre. The total cost of the refreshment will be rupees 4280.
can you tell.
1. The ratio of the number of girls to the number of boys in the class.
2. The cost per head if two teachers are also going with the class?
3. If their first stop is at a place 22 km from the school; what percent of the total distance of 55 kilometre is this? What percent of the distance is left to be covered?
Answers
Ratio of Girls to boys = 3 : 2
Step-by-step explanation:
Girls are 60% of the total number of students and are 18 in number.
Let say total students = T
Girls = (60/100)T
=> 18 = 3T/5
=> T = 30
Boys = 30 - 18 = 12
Ratio of Girls to boys = 18 : 12
=> 3 : 2
Transportation cost = 55 * 12 = 660 Rs
Refreshment Cost = 4280 Rs
Total Cost = 660 + 4280 = 4940 Rs
Total number of Heads = 30 Students + 2 Teachers = 32 Teachers
Cost Per Head = 4940/32 = 154.375 Rs
(22/55) * 100 = 40%
Distance left = 100% - 40% = 60%
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