Question

10. During a tree-planting event, a group of boys and girls planted a total of 150 trees. Each boy planted
10 trees and girl 5 trees. If the number of boys was 10, find the number of girls in the event.
11
Mbit is
ars old His sister is 3 times as old as he is. His brother is 4 years younger than his sister,​

Answer 1

Step-by-step explanation:

number of boys = 10

let number of girls = g

trees planted by 1 boy = 10

trees planted by 10 boys = 10×10 = 100

trees planted by 1 girl = 5

trees planted by g girls = 5×g = 5g

total number of trees planted = 150

=> 100 + 5g = 150

=> 5g = 150-100 = 50

=> g = 50/5 = 10

number of girls = g = 10