10. The picnic site is 60 km from the school. The boys are 40% of the total number of students going
for picnic and are 12 in number. The cost of the conveyance is 12 per km. The total cost of
refreshments will be 4320. Find:
(a) The ratio of the number of boys to the number of girls going for picnic.
(b) The cost per head if two teachers are accompanying them.
(c) If the bus stopped for refreshments at the distance of 21 km from the school, what per cent
of the distance is left to be covered?
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