Math, asked by manju991970, 1 year ago

Priya and meena , alone can complete a sketch in 15 days and 20
days respectively. If they do sketching together for 4 days ,
then what is the amount (in units) of sketch left if the total
sketch is for 225 units?

Answers

Answered by santy2
26
Priya can complete the sketch in 15 days

While Meena can complete the same sketch 20 days 

That means:

1) Priya can do 1/15 of the sketch in 1 day 

If the sketch is 225 units that means she can do 1/15 
× 225 units = 15 units in 1 day
 
and in 4 days she can do = 15 units/ day × 4 = 60 units

2) Meena can do 1/20 of the sketch in 1 day

That is 1/20 of 225 = 1/20 × 225 = 11.25

And in 4 days she can do  :  11.25 units/day × 4 = 45 units

Therefore the amount of sketch they can do in 4 days together:

= 60 units + 45 units = 105 units

This means the amount of sketch left:

= 225 units - 105 units = 120 units

The amount of sketch left = 120 units
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