Question

Yrr koi toh mujhe step-by-step answer dede....test h aaj mere plz...step-by-step answers plz . don't spam. 12 and 13​

Answer 1

Step-by-step explanation:

13. Total no. of students=2500

No. of girls = 1100

Therefore, no. of boys = 2500-1100=1400

Boys who passed the examination=50%=700

Therefore, boys who failed=1400-700=700

Girls who passed the examination=40%=440

Therefore, girls who failed= 1200-440=760

Now, total number of students who failed=700+760=1460

Therefore, percentage of students who failed=66.8%

Hope it helps.

Answer 2

Answer:

1.sides of rectangle=20 cm and 15 cm

therefore, area of rectangle=20cm ×15cm=300cm2

new sides by increasing=(20+20/100×20) and (15+20/100×15)

=24cm and 18 cm

new area of rectangle=24cm×18cm=432cm2

area increased=432 - 300

=132

℅ of area increase=132/300×100=44%

2.total number of students 2500

no of girls 1100

therefore, no of boys=2500-1100=1400

passed boys=50% of 1400=700

passed girls=40% of 1100=440

total no of student passed=700+440=1140

failed student=2500-1140=1360