Simran painted 2/3 of the wall space in her room. Her brother Rahul helped and painted 1/5 of the wall space. How much did they paint together? What part of the whole space is left unpainted?

Question

Shiksha Nation · Accepted Answer

Space of the wall painted by Simran = 2/3

Space of the wall painted by Rahul = 1/5

Total space painted by both = 2/3+1/5

=(2×5)/(3×5)+(1×3)/(5×3)=10/15+3/15=(10+3)/15=13/15

Unpainted space of the wall =1-13/15

=1/1-13/15=(1×15)/(1×15)-(13×1)/(15×1)

=15/15-13/15=(15-13)/15=2/15

Hence, 2/15 th of the wall space is unpainted.

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