Question

A sum of rs1400 is to be used to give seven cash prizes to students if each prize is rs40 less than the preceding price find the value of each prize

Answer 1

Step-by-step explanation:

it will form an A.P

using sum formula

s=n/2(2a+(n-1)×d)

1400=7/2(2a+(7-1)×40)

1400×2/7=(2a+240)

400-240=2a

a=80

the value of each prise is

80,120,160,200,240,280,320