Question

When asha and usha stand on a weighing scale together the reading shows 151 kgs when usha and isha stand together the real reading is 132k gs and when isha and asha stand together the reading is 115kgs .What is the weight of usha in kgs??

Answer 1

Let Asha's weigh be a
Usha be u
and Isha be i

So given that Asha and Usha together weighs 151 kg

=> a + u = 151 kg...... (1)

Similarly,

u + i = 132 kg........(2)

and

i + a = 115 ................(3)

Subtract (3) from (2)

=> u + i - (i + a) = 132 - 115

=> u + i - i - a = 17

=> u - a = 17 .................(4)

add (1) and (4)

=> u + a + u - a = 151 + 17

=> 2u = 168

=> u = 168/2

=> u = 84 kg

So weight of Usha is 84 kg