Question

1) The denominator of a rational number is 2 less than the numerator.If numerator is increased by 4 and denominator deceased by 3 the number obtained is 5 upon 2
2) In a right triangle ABC, Angel-B = 90°,if AB = 5cm, BC = 12cm, find AC ​

Answer 1

Answer:

Answer:

1) let numerator =x

then denominator =x+4

according to question

x+3÷(x+4)-5=2

x+3÷x-1=2

cross multiplication

x+3=(x-1) 2

x+3=2x-2

2+3=2x-x

x=5

numerator=5

denominator=5+4=9

2)Answer:

13

given:

angle B=90°

so it is a right angled triangle

AB=5m

BC=12cm

Step-by-step explanation:

by Pythagoras theorem

AC^2=AB^2+BC^2

AC^2=5^2+12^2

AC^2=25+144

AC^2=139

AC=√139

AC=13

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