Question

the average height of mona and riya is 174 cm .riya is 40 cm taller than mona.how tall is riya?​

Answer 1

Answer:

height of riya = 194cm

height of riya = 194cmStep-by-step explanation:

let height of mona be x

height of riya = 40cm + x

average of their height = { (x) + (40+x) } ÷ 2

=> 174 = { 40+2x} ÷ 2

=> 40 + 2x = 174×2 = 348

=> 2x = 348-40

=> 2x = 308

=> x = 308÷2

=> x = 154cm

height of mona = x = 154cm

height of riya = x + 40 = 154cm + 40cm

=> height of riya = 194cm

Answer 2

Step-by-step explanation:

let the height of mona be X cm

let the height of riya be X+40

the sum of both there height = 174 cm

X + 40 + X divide by 2 = 174

2x + 40 = 174 ×2

2x + 40 = 348

2x = 308

X = 154 cm

the height of riya 154+40 = 194 cm